#VU103780 Heap-based buffer overflow in Windows and Windows Server - CVE-2025-21418

Cybersecurity Help s.r.o.

Published: 2025-02-11

Vulnerability identifier: #VU103780

Vulnerability risk: High

CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2025-21418

CWE-ID: CWE-122

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in ancillary function driver for WinSock. A local user can trigger a heap-based buffer overflow and execute arbitrary code with elevated privileges.

Note, the vulnerability is being actively exploited in the wild.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 21H2 10.0.19041.3920, 10 21H2 10.0.19043.4529, 10 21H2 10.0.19044.1147, 10 21H2 10.0.19044.1149, 10 21H2 10.0.19044.1151, 10 21H2 10.0.19044.1165, 10 21H2 10.0.19044.1200, 10 21H2 10.0.19044.1202 - 11 22H2 10.0.22621.4037, 10 21H2 10.0.19044.1237 - 11 24H2 10.0.26100.2161, 10 21H2 10.0.19044.1263, 10 21H2 10.0.19044.1266, 10 21H2 10.0.19044.1288, 10 21H2 10.0.19044.1319, 10 21H2 10.0.19044.1320, 10 21H2 10.0.19044.1348, 10 21H2 10.0.19044.1379, 10 21H2 10.0.19044.1381, 10 21H2 10.0.19044.1387, 10 21H2 10.0.19044.1415, 10 21H2 10.0.19044.1466, 10 21H2 10.0.19044.1469, 10 21H2 10.0.19044.1499, 10 21H2 10.0.19044.1503, 10 21H2 10.0.19044.1526, 10 21H2 10.0.19044.1566, 10 21H2 10.0.19044.1586, 10 21H2 10.0.19044.1618, 10 21H2 10.0.19044.1620, 10 21H2 10.0.19044.1645, 10 21H2 10.0.19044.1679, 10 21H2 10.0.19044.1682, 10 21H2 10.0.19044.1706, 10 21H2 10.0.19044.1708, 10 21H2 10.0.19044.1737, 10 21H2 10.0.19044.1739, 10 21H2 10.0.19044.1741, 10 21H2 10.0.19044.1766, 10 21H2 10.0.19044.1767, 10 21H2 10.0.19044.1806, 10 21H2 10.0.19044.1826, 10 21H2 10.0.19044.1862, 10 21H2 10.0.19044.1865, 10 21H2 10.0.19044.1889, 10 21H2 10.0.19044.1947, 10 21H2 10.0.19044.1949, 10 21H2 10.0.19044.2006, 10 21H2 10.0.19044.2075, 10 21H2 10.0.19044.2130, 10 21H2 10.0.19044.2132, 10 21H2 10.0.19044.2192, 10 21H2 10.0.19044.2193, 10 21H2 10.0.19044.2194, 10 21H2 10.0.19044.2251, 10 21H2 10.0.19044.2311, 10 21H2 10.0.19044.2364, 10 21H2 10.0.19044.2486, 10 21H2 10.0.19044.2545, 10 21H2 10.0.19044.2546, 10 21H2 10.0.19044.2604, 10 21H2 10.0.19044.2673, 10 21H2 10.0.19044.2728, 10 21H2 10.0.19044.2788, 10 21H2 10.0.19044.2846, 10 21H2 10.0.19044.2965, 10 21H2 10.0.19044.3086, 10 21H2 10.0.19044.3208, 10 21H2 10.0.19044.3324, 10 21H2 10.0.19044.3448, 10 21H2 10.0.19044.3570, 10 21H2 10.0.19044.3693, 10 22H2 10.0.19045.2075, 10 22H2 10.0.19045.2130, 10 22H2 10.0.19045.2132, 10 22H2 10.0.19045.2193, 10 22H2 10.0.19045.2194, 10 22H2 10.0.19045.2251, 10 22H2 10.0.19045.2301, 10 22H2 10.0.19045.2311, 10 22H2 10.0.19045.2364, 10 22H2 10.0.19045.2486, 10 22H2 10.0.19045.2546, 10 22H2 10.0.19045.2604, 10 22H2 10.0.19045.2670, 10 22H2 10.0.19045.2673, 10 22H2 10.0.19045.2728, 10 22H2 10.0.19045.2787, 10 22H2 10.0.19045.2788, 10 22H2 10.0.19045.2846, 10 22H2 10.0.19045.2908, 10 22H2 10.0.19045.2913, 10 22H2 10.0.19045.2965, 10 22H2 10.0.19045.3030, 10 22H2 10.0.19045.3031, 10 22H2 10.0.19045.3086, 10 22H2 10.0.19045.3154, 10 22H2 10.0.19045.3155, 10 22H2 10.0.19045.3208, 10 22H2 10.0.19045.3269, 10 22H2 10.0.19045.3271, 10 22H2 10.0.19045.3324, 10 22H2 10.0.19045.3391, 10 22H2 10.0.19045.3393, 10 22H2 10.0.19045.3448, 10 22H2 10.0.19045.3513, 10 22H2 10.0.19045.3516, 10 22H2 10.0.19045.3570, 10 22H2 10.0.19045.3636, 10 22H2 10.0.19045.3693, 10 22H2 10.0.19045.3754, 10 22H2 10.0.19045.3757, 10 22H2 10.0.19045.3758, 10 22H2 10.0.19045.3803, 10 22H2 10.0.19045.3930, 10 22H2 10.0.19045.3992, 10 22H2 10.0.19045.3996, 10 22H2 10.0.19045.4046, 10 22H2 10.0.19045.4116, 10 22H2 10.0.19045.4123, 10 22H2 10.0.19045.4170, 10 22H2 10.0.19045.4233, 10 22H2 10.0.19045.4235, 10 22H2 10.0.19045.4239, 10 22H2 10.0.19045.4291, 10 22H2 10.0.19045.4353, 10 22H2 10.0.19045.4355, 10 22H2 10.0.19045.4412, 10 22H2 10.0.19045.4472, 10 22H2 10.0.19045.4474, 10 22H2 10.0.19045.4529, 10 22H2 10.0.19045.4593, 10 22H2 10.0.19045.4598, 10 22H2 10.0.19045.4651, 10 22H2 10.0.19045.4713, 10 22H2 10.0.19045.4717, 10 22H2 10.0.19045.4780, 10 22H2 10.0.19045.4842, 10 22H2 10.0.19045.4894, 10 22H2 10.0.19045.4955, 10 22H2 10.0.19045.4957, 10 22H2 10.0.19045.5011, 10 22H2 10.0.19045.5070, 10 22H2 10.0.19045.5073, 10 22H2 10.0.19045.5131, 10 22H2 10.0.19045.5247, 10 22H2 10.0.19045.5371, 10 1507 10.0.10240.1643, 10 1507 10.0.10240.1652, 10 1507 10.0.10240.1659, 10 1507 10.0.10240.1719, 10 1507 10.0.10240.1777, 10 1507 10.0.10240.1906, 10 1507 10.0.10240.1936, 10 1507 10.0.10240.16405, 10 1507 10.0.10240.16413, 10 1507 10.0.10240.16433, 10 1507 10.0.10240.16445, 10 1507 10.0.10240.16463, 10 1507 10.0.10240.16487, 10 1507 10.0.10240.16549, 10 1507 10.0.10240.16566, 10 1507 10.0.10240.16601, 10 1507 10.0.10240.16644, 10 1507 10.0.10240.16683, 10 1507 10.0.10240.16725, 10 1507 10.0.10240.16771, 10 1507 10.0.10240.16854, 10 1507 10.0.10240.16942, 10 1507 10.0.10240.17024, 10 1507 10.0.10240.17071, 10 1507 10.0.10240.17113, 10 1507 10.0.10240.17146, 10 1507 10.0.10240.17202, 10 1507 10.0.10240.17236, 10 1507 10.0.10240.17319, 10 1507 10.0.10240.17354, 10 1507 10.0.10240.17394, 10 1507 10.0.10240.17443, 10 1507 10.0.10240.17446, 10 1507 10.0.10240.17488, 10 1507 10.0.10240.17533, 10 1507 10.0.10240.17609, 10 1507 10.0.10240.17643, 10 1507 10.0.10240.17673, 10 1507 10.0.10240.17709, 10 1507 10.0.10240.17738, 10 1507 10.0.10240.17741, 10 1507 10.0.10240.17797, 10 1507 10.0.10240.17831, 10 1507 10.0.10240.17861, 10 1507 10.0.10240.17889, 10 1507 10.0.10240.17914, 10 1507 10.0.10240.17918, 10 1507 10.0.10240.17946, 10 1507 10.0.10240.17976, 10 1507 10.0.10240.18005, 10 1507 10.0.10240.18036, 10 1507 10.0.10240.18063, 10 1507 10.0.10240.18064, 10 1507 10.0.10240.18094, 10 1507 10.0.10240.18132, 10 1507 10.0.10240.18135, 10 1507 10.0.10240.18158, 10 1507 10.0.10240.18186, 10 1507 10.0.10240.18187, 10 1507 10.0.10240.18215, 10 1507 10.0.10240.18218, 10 1507 10.0.10240.18244, 10 1507 10.0.10240.18275, 10 1507 10.0.10240.18305, 10 1507 10.0.10240.18308, 10 1507 10.0.10240.18333, 10 1507 10.0.10240.18334, 10 1507 10.0.10240.18335, 10 1507 10.0.10240.18368, 10 1507 10.0.10240.18395, 10 1507 10.0.10240.18427, 10 1507 10.0.10240.18453, 10 1507 10.0.10240.18486, 10 1507 10.0.10240.18519, 10 1507 10.0.10240.18545, 10 1507 10.0.10240.18575, 10 1507 10.0.10240.18608, 10 1507 10.0.10240.18609, 10 1507 10.0.10240.18638, 10 1507 10.0.10240.18666, 10 1507 10.0.10240.18696, 10 1507 10.0.10240.18725, 10 1507 10.0.10240.18756, 10 1507 10.0.10240.18782, 10 1507 10.0.10240.18818, 10 1507 10.0.10240.18841, 10 1507 10.0.10240.18874, 10 1507 10.0.10240.18875, 10 1507 10.0.10240.18906, 10 1507 10.0.10240.18932, 10 1507 10.0.10240.18967, 10 1507 10.0.10240.18969, 10 1507 10.0.10240.19003, 10 1507 10.0.10240.19022, 10 1507 10.0.10240.19086, 10 1507 10.0.10240.19119, 10 1507 10.0.10240.19145, 10 1507 10.0.10240.19177, 10 1507 10.0.10240.19179, 10 1507 10.0.10240.19204, 10 1507 10.0.10240.19235, 10 1507 10.0.10240.19265, 10 1507 10.0.10240.19297, 10 1507 10.0.10240.19325, 10 1507 10.0.10240.19387, 10 1507 10.0.10240.19444, 10 1507 10.0.10240.19507, 10 1507 10.0.10240.19509, 10 1507 10.0.10240.19567, 10 1507 10.0.10240.19624, 10 1507 10.0.10240.19685, 10 1507 10.0.10240.19747, 10 1507 10.0.10240.19805, 10 1507 10.0.10240.19869, 10 1507 10.0.10240.19926, 10 1507 10.0.10240.19983, 10 1507 10.0.10240.19986, 10 1507 10.0.10240.20048, 10 1507 10.0.10240.20107, 10 1507 10.0.10240.20162, 10 1507 10.0.10240.20232, 10 1507 10.0.10240.20308, 10 1507 10.0.10240.20345, 10 1507 10.0.10240.20402, 10 1507 10.0.10240.20469, 10 1507 10.0.10240.20526, 10 1507 10.0.10240.20596, 10 1507 10.0.10240.20651, 10 1507 10.0.10240.20680, 10 1507 10.0.10240.20710, 10 1507 10.0.10240.20751, 10 1507 10.0.10240.20766, 10 1507 10.0.10240.20796, 10 1507 10.0.10240.20826, 10 1507 10.0.10240.20857, 10 1507 10.0.10240.20890, 10 1607 10.0.14393.10, 10 1607 10.0.14393.33, 10 1607 10.0.14393.51, 10 1607 10.0.14393.68, 10 1607 10.0.14393.82, 10 1607 10.0.14393.105, 10 1607 10.0.14393.148, 10 1607 10.0.14393.167, 10 1607 10.0.14393.177, 10 1607 10.0.14393.187, 10 1607 10.0.14393.189, 10 1607 10.0.14393.222, 10 1607 10.0.14393.243, 10 1607 10.0.14393.258, 10 1607 10.0.14393.267, 10 1607 10.0.14393.321, 10 1607 10.0.14393.351, 10 1607 10.0.14393.363, 10 1607 10.0.14393.375, 10 1607 10.0.14393.393, 10 1607 10.0.14393.435, 10 1607 10.0.14393.447, 10 1607 10.0.14393.453, 10 1607 10.0.14393.477, 10 1607 10.0.14393.479, 10 1607 10.0.14393.576, 10 1607 10.0.14393.585, 10 1607 10.0.14393.693, 10 1607 10.0.14393.726, 10 1607 10.0.14393.729, 10 1607 10.0.14393.953, 10 1607 10.0.14393.969, 10 1607 10.0.14393.970, 10 1607 10.0.14393.1066, 10 1607 10.0.14393.1198, 10 1607 10.0.14393.1230, 10 1607 10.0.14393.1358, 10 1607 10.0.14393.1378, 10 1607 10.0.14393.1480, 10 1607 10.0.14393.1532, 10 1607 10.0.14393.1537, 10 1607 10.0.14393.1593, 10 1607 10.0.14393.1613, 10 1607 10.0.14393.1670, 10 1607 10.0.14393.1715, 10 1607 10.0.14393.1737, 10 1607 10.0.14393.1770, 10 1607 10.0.14393.1794, 10 1607 10.0.14393.1797, 10 1607 10.0.14393.1884, 10 1607 10.0.14393.1914, 10 1607 10.0.14393.1944, 10 1607 10.0.14393.2007, 10 1607 10.0.14393.2034, 10 1607 10.0.14393.2035, 10 1607 10.0.14393.2068, 10 1607 10.0.14393.2097, 10 1607 10.0.14393.2125, 10 1607 10.0.14393.2155, 10 1607 10.0.14393.2156, 10 1607 10.0.14393.2189, 10 1607 10.0.14393.2214, 10 1607 10.0.14393.2248, 10 1607 10.0.14393.2273, 10 1607 10.0.14393.2312, 10 1607 10.0.14393.2339, 10 1607 10.0.14393.2363, 10 1607 10.0.14393.2368, 10 1607 10.0.14393.2395, 10 1607 10.0.14393.2396, 10 1607 10.0.14393.2430, 10 1607 10.0.14393.2457, 10 1607 10.0.14393.2485, 10 1607 10.0.14393.2515, 10 1607 10.0.14393.2517, 10 1607 10.0.14393.2551, 10 1607 10.0.14393.2580, 10 1607 10.0.14393.2608, 10 1607 10.0.14393.2639, 10 1607 10.0.14393.2641, 10 1607 10.0.14393.2665, 10 1607 10.0.14393.2670, 10 1607 10.0.14393.2724, 10 1607 10.0.14393.2759, 10 1607 10.0.14393.2791, 10 1607 10.0.14393.2828, 10 1607 10.0.14393.2848, 10 1607 10.0.14393.2879, 10 1607 10.0.14393.2906, 10 1607 10.0.14393.2908, 10 1607 10.0.14393.2941, 10 1607 10.0.14393.2969, 10 1607 10.0.14393.2972, 10 1607 10.0.14393.2999, 10 1607 10.0.14393.3025, 10 1607 10.0.14393.3053, 10 1607 10.0.14393.3056, 10 1607 10.0.14393.3085, 10 1607 10.0.14393.3115, 10 1607 10.0.14393.3144, 10 1607 10.0.14393.3181, 10 1607 10.0.14393.3204, 10 1607 10.0.14393.3206, 10 1607 10.0.14393.3242, 10 1607 10.0.14393.3243, 10 1607 10.0.14393.3274, 10 1607 10.0.14393.3300, 10 1607 10.0.14393.3326, 10 1607 10.0.14393.3384, 10 1607 10.0.14393.3443, 10 1607 10.0.14393.3474, 10 1607 10.0.14393.3504, 10 1607 10.0.14393.3542, 10 1607 10.0.14393.3564, 10 1607 10.0.14393.3595, 10 1607 10.0.14393.3630, 10 1607 10.0.14393.3659, 10 1607 10.0.14393.3686, 10 1607 10.0.14393.3750, 10 1607 10.0.14393.3755, 10 1607 10.0.14393.3808, 10 1607 10.0.14393.3866, 10 1607 10.0.14393.3930, 10 1607 10.0.14393.3986, 10 1607 10.0.14393.4046, 10 1607 10.0.14393.4048, 10 1607 10.0.14393.4104, 10 1607 10.0.14393.4169, 10 1607 10.0.14393.4225, 10 1607 10.0.14393.4283, 10 1607 10.0.14393.4288, 10 1607 10.0.14393.4350, 10 1607 10.0.14393.4402, 10 1607 10.0.14393.4467, 10 1607 10.0.14393.4470, 10 1607 10.0.14393.4530, 10 1607 10.0.14393.4532, 10 1607 10.0.14393.4583, 10 1607 10.0.14393.4651, 10 1607 10.0.14393.4704, 10 1607 10.0.14393.4770, 10 1607 10.0.14393.4771, 10 1607 10.0.14393.4825, 10 1607 10.0.14393.4827, 10 1607 10.0.14393.4886, 10 1607 10.0.14393.4889, 10 1607 10.0.14393.4946, 10 1607 10.0.14393.5006, 10 1607 10.0.14393.5066, 10 1607 10.0.14393.5125, 10 1607 10.0.14393.5127, 10 1607 10.0.14393.5192, 10 1607 10.0.14393.5246, 10 1607 10.0.14393.5291, 10 1607 10.0.14393.5356, 10 1607 10.0.14393.5427, 10 1607 10.0.14393.5429, 10 1607 10.0.14393.5501, 10 1607 10.0.14393.5502, 10 1607 10.0.14393.5582, 10 1607 10.0.14393.5648, 10 1607 10.0.14393.5717, 10 1607 10.0.14393.5786, 10 1607 10.0.14393.5850, 10 1607 10.0.14393.5921, 10 1607 10.0.14393.5989, 10 1607 10.0.14393.5996, 10 1607 10.0.14393.6085, 10 1607 10.0.14393.6167, 10 1607 10.0.14393.6252, 10 1607 10.0.14393.6351, 10 1607 10.0.14393.6452, 10 1607 10.0.14393.6529, 10 1607 10.0.14393.6614, 10 1607 10.0.14393.6709, 10 1607 10.0.14393.6796, 10 1607 10.0.14393.6799, 10 1607 10.0.14393.6897, 10 1607 10.0.14393.6981, 10 1607 10.0.14393.7070, 10 1607 10.0.14393.7159, 10 1607 10.0.14393.7259, 10 1607 10.0.14393.7336, 10 1607 10.0.14393.7428, 10 1607 10.0.14393.7515, 10 1607 10.0.14393.7606, 10 1607 10.0.14393.7699, 10 1809 10.0.17763.1, 10 1809 10.0.17763.55, 10 1809 10.0.17763.107, 10 1809 10.0.17763.134, 10 1809 10.0.17763.168, 10 1809 10.0.17763.194, 10 1809 10.0.17763.195, 10 1809 10.0.17763.253, 10 1809 10.0.17763.292, 10 1809 10.0.17763.316, 10 1809 10.0.17763.348, 10 1809 10.0.17763.379, 10 1809 10.0.17763.404, 10 1809 10.0.17763.437, 10 1809 10.0.17763.439, 10 1809 10.0.17763.475, 10 1809 10.0.17763.503, 10 1809 10.0.17763.504, 10 1809 10.0.17763.529, 10 1809 10.0.17763.557, 10 1809 10.0.17763.592, 10 1809 10.0.17763.593, 10 1809 10.0.17763.615, 10 1809 10.0.17763.652, 10 1809 10.0.17763.678, 10 1809 10.0.17763.720, 10 1809 10.0.17763.737, 10 1809 10.0.17763.740, 10 1809 10.0.17763.774, 10 1809 10.0.17763.775, 10 1809 10.0.17763.805, 10 1809 10.0.17763.832, 10 1809 10.0.17763.864, 10 1809 10.0.17763.914, 10 1809 10.0.17763.973, 10 1809 10.0.17763.1012, 10 1809 10.0.17763.1039, 10 1809 10.0.17763.1075, 10 1809 10.0.17763.1098, 10 1809 10.0.17763.1131, 10 1809 10.0.17763.1132, 10 1809 10.0.17763.1158, 10 1809 10.0.17763.1192, 10 1809 10.0.17763.1217, 10 1809 10.0.17763.1282, 10 1809 10.0.17763.1294, 10 1809 10.0.17763.1339, 10 1809 10.0.17763.1369, 10 1809 10.0.17763.1397, 10 1809 10.0.17763.1432, 10 1809 10.0.17763.1457, 10 1809 10.0.17763.1490, 10 1809 10.0.17763.1518, 10 1809 10.0.17763.1554, 10 1809 10.0.17763.1577, 10 1809 10.0.17763.1579, 10 1809 10.0.17763.1613, 10 1809 10.0.17763.1637, 10 1809 10.0.17763.1697, 10 1809 10.0.17763.1728, 10 1809 10.0.17763.1757, 10 1809 10.0.17763.1790, 10 1809 10.0.17763.1817, 10 1809 10.0.17763.1821, 10 1809 10.0.17763.1823, 10 1809 10.0.17763.1852, 10 1809 10.0.17763.1879, 10 1809 10.0.17763.1911, 10 1809 10.0.17763.1935, 10 1809 10.0.17763.1971, 10 1809 10.0.17763.1999, 10 1809 10.0.17763.2028, 10 1809 10.0.17763.2029, 10 1809 10.0.17763.2061, 10 1809 10.0.17763.2090, 10 1809 10.0.17763.2091, 10 1809 10.0.17763.2114, 10 1809 10.0.17763.2145, 10 1809 10.0.17763.2183, 10 1809 10.0.17763.2213, 10 1809 10.0.17763.2237, 10 1809 10.0.17763.2268, 10 1809 10.0.17763.2300, 10 1809 10.0.17763.2305, 10 1809 10.0.17763.2330, 10 1809 10.0.17763.2366, 10 1809 10.0.17763.2369, 10 1809 10.0.17763.2452, 10 1809 10.0.17763.2458, 10 1809 10.0.17763.2510, 10 1809 10.0.17763.2565, 10 1809 10.0.17763.2628, 10 1809 10.0.17763.2686, 10 1809 10.0.17763.2746, 10 1809 10.0.17763.2803, 10 1809 10.0.17763.2867, 10 1809 10.0.17763.2928, 10 1809 10.0.17763.2931, 10 1809 10.0.17763.2989, 10 1809 10.0.17763.3046, 10 1809 10.0.17763.3113, 10 1809 10.0.17763.3165, 10 1809 10.0.17763.3232, 10 1809 10.0.17763.3287, 10 1809 10.0.17763.3346, 10 1809 10.0.17763.3406, 10 1809 10.0.17763.3469, 10 1809 10.0.17763.3532, 10 1809 10.0.17763.3534, 10 1809 10.0.17763.3650, 10 1809 10.0.17763.3653, 10 1809 10.0.17763.3770, 10 1809 10.0.17763.3772, 10 1809 10.0.17763.3887, 10 1809 10.0.17763.4010, 10 1809 10.0.17763.4131, 10 1809 10.0.17763.4252, 10 1809 10.0.17763.4377, 10 1809 10.0.17763.4499, 10 1809 10.0.17763.4645, 10 1809 10.0.17763.4737, 10 1809 10.0.17763.4851, 10 1809 10.0.17763.4974, 10 1809 10.0.17763.5122, 10 1809 10.0.17763.5206, 10 1809 10.0.17763.5329, 10 1809 10.0.17763.5458, 10 1809 10.0.17763.5576, 10 1809 10.0.17763.5579, 10 1809 10.0.17763.5696, 10 1809 10.0.17763.5820, 10 1809 10.0.17763.5936, 10 1809 10.0.17763.6054, 10 1809 10.0.17763.6189, 10 1809 10.0.17763.6293, 10 1809 10.0.17763.6414, 10 1809 10.0.17763.6532, 10 1809 10.0.17763.6659, 10 1809 10.0.17763.6775, 11 22H2 10.0.22449.1000, 11 22H2 10.0.22454.1000, 11 22H2 10.0.22458.1000, 11 22H2 10.0.22463.1000, 11 22H2 10.0.22468.1000, 11 22H2 10.0.22471.1000, 11 22H2 10.0.22478.1000, 11 22H2 10.0.22478.1012, 11 22H2 10.0.22483.1000, 11 22H2 10.0.22483.1011, 11 22H2 10.0.22489.1000, 11 22H2 10.0.22494.1000, 11 22H2 10.0.22499.1000, 11 22H2 10.0.22499.1010, 11 22H2 10.0.22504.1000, 11 22H2 10.0.22504.1010, 11 22H2 10.0.22509.1000, 11 22H2 10.0.22509.1011, 11 22H2 10.0.22518.1000, 11 22H2 10.0.22518.1012, 11 22H2 10.0.22523.1000, 11 22H2 10.0.22526.1000, 11 22H2 10.0.22533.1001, 11 22H2 10.0.22538.1000, 11 22H2 10.0.22538.1010, 11 22H2 10.0.22543.1000, 11 22H2 10.0.22557.1, 11 22H2 10.0.22563.1, 11 22H2 10.0.22567.1, 11 22H2 10.0.22567.100, 11 22H2 10.0.22567.200, 11 22H2 10.0.22572.1, 11 22H2 10.0.22572.100, 11 22H2 10.0.22572.201, 11 22H2 10.0.22579.1, 11 22H2 10.0.22579.100, 11 22H2 10.0.22581.1, 11 22H2 10.0.22581.100, 11 22H2 10.0.22581.200, 11 22H2 10.0.22593.1, 11 22H2 10.0.22598.1, 11 22H2 10.0.22598.100, 11 22H2 10.0.22598.200, 11 22H2 10.0.22610.1, 11 22H2 10.0.22616.1, 11 22H2 10.0.22616.100, 11 22H2 10.0.22621.1, 11 22H2 10.0.22621.105, 11 22H2 10.0.22621.160, 11 22H2 10.0.22621.169, 11 22H2 10.0.22621.232, 11 22H2 10.0.22621.290, 11 22H2 10.0.22621.317, 11 22H2 10.0.22621.382, 11 22H2 10.0.22621.436, 11 22H2 10.0.22621.440, 11 22H2 10.0.22621.450, 11 22H2 10.0.22621.457, 11 22H2 10.0.22621.521, 11 22H2 10.0.22621.525, 11 22H2 10.0.22621.575, 11 22H2 10.0.22621.586, 11 22H2 10.0.22621.590, 11 22H2 10.0.22621.598, 11 22H2 10.0.22621.601, 11 22H2 10.0.22621.607, 11 22H2 10.0.22621.608, 11 22H2 10.0.22621.674, 11 22H2 10.0.22621.675, 11 22H2 10.0.22621.730, 11 22H2 10.0.22621.741, 11 22H2 10.0.22621.746, 11 22H2 10.0.22621.754, 11 24H2 10.0.26100.2240, 11 24H2 10.0.26100.2314, 11 24H2 10.0.26100.2528, 11 24H2 10.0.26100.2605, 11 24H2 10.0.26100.2894

Windows Server: 2008 R2 6.1.7601.27067, 2008 R2 6.1.7601.27117, 2008 SP2, 2008 R2 SP1, 2008 R2 6.1.7601.27017, 2008 R2 6.1.7601.27170, 2008 R2 6.1.7601.27219, 2008 R2 6.1.7601.27277, 2008 R2 6.1.7601.27320, 2008 R2 6.1.7601.27366, 2008 R2 6.1.7601.27415, 2008 R2 6.1.7601.27467, 2008 R2 6.1.7601.27520, 2008 6.0.6003.22567, 2008 6.0.6003.22618, 2008 6.0.6003.22668, 2008 6.0.6003.22720, 2008 6.0.6003.22769, 2008 6.0.6003.22825, 2008 6.0.6003.22870, 2008 6.0.6003.22918, 2008 6.0.6003.22966, 2008 6.0.6003.23016, 2008 6.0.6003.23070, 2012 Gold, 2012 R2 6.3.9600.21871, 2012 R2 6.3.9600.21924, 2012 R2 6.3.9600.21972, 2012 R2 6.3.9600.22023, 2012 R2 6.3.9600.22074, 2012 R2 6.3.9600.22134, 2012 R2 6.3.9600.22175, 2012 R2 6.3.9600.22221, 2012 R2 6.3.9600.22267, 2012 R2 6.3.9600.22318, 2012 R2 6.3.9600.22371, 2012 6.2.9200.24768, 2012 6.2.9200.24821, 2012 6.2.9200.24868, 2012 6.2.9200.24919, 2012 6.2.9200.24975, 2012 6.2.9200.25031, 2012 6.2.9200.25073, 2012 6.2.9200.25118, 2012 6.2.9200.25165, 2012 6.2.9200.25222, 2012 6.2.9200.25273, 2016 10.0.14393.10, 2016 10.0.14393.51, 2016 10.0.14393.82, 2016 10.0.14393.105, 2016 10.0.14393.187, 2016 10.0.14393.222, 2016 10.0.14393.321, 2016 10.0.14393.351, 2016 10.0.14393.447, 2016 10.0.14393.479, 2016 10.0.14393.576, 2016 10.0.14393.693, 2016 10.0.14393.953, 2016 10.0.14393.969, 2016 10.0.14393.1066, 2016 10.0.14393.1198, 2016 10.0.14393.1358, 2016 10.0.14393.1378, 2016 10.0.14393.1480, 2016 10.0.14393.1532, 2016 10.0.14393.1537, 2016 10.0.14393.1593, 2016 10.0.14393.1613, 2016 10.0.14393.1670, 2016 10.0.14393.1715, 2016 10.0.14393.1737, 2016 10.0.14393.1770, 2016 10.0.14393.1794, 2016 10.0.14393.1797, 2016 10.0.14393.1884, 2016 10.0.14393.1914, 2016 10.0.14393.1944, 2016 10.0.14393.2007, 2016 10.0.14393.2035, 2016 10.0.14393.2068, 2016 10.0.14393.2097, 2016 10.0.14393.2125, 2016 10.0.14393.2155, 2016 10.0.14393.2156, 2016 10.0.14393.2189, 2016 10.0.14393.2214, 2016 10.0.14393.2248, 2016 10.0.14393.2273, 2016 10.0.14393.2312, 2016 10.0.14393.2339, 2016 10.0.14393.2363, 2016 10.0.14393.2368, 2016 10.0.14393.2395, 2016 10.0.14393.2396, 2016 10.0.14393.2430, 2016 10.0.14393.2457, 2016 10.0.14393.2485, 2016 10.0.14393.2515, 2016 10.0.14393.2551, 2016 10.0.14393.2580, 2016 10.0.14393.2608, 2016 10.0.14393.2639, 2016 10.0.14393.2641, 2016 10.0.14393.2665, 2016 10.0.14393.2670, 2016 10.0.14393.2724, 2016 10.0.14393.2759, 2016 10.0.14393.2791, 2016 10.0.14393.2828, 2016 10.0.14393.2848, 2016 10.0.14393.2879, 2016 10.0.14393.2906, 2016 10.0.14393.2908, 2016 10.0.14393.2941, 2016 10.0.14393.2969, 2016 10.0.14393.2972, 2016 10.0.14393.2999, 2016 10.0.14393.3025, 2016 10.0.14393.3053, 2016 10.0.14393.3056, 2016 10.0.14393.3085, 2016 10.0.14393.3115, 2016 10.0.14393.3144, 2016 10.0.14393.3181, 2016 10.0.14393.3204, 2016 10.0.14393.3206, 2016 10.0.14393.3242, 2016 10.0.14393.3243, 2016 10.0.14393.3274, 2016 10.0.14393.3300, 2016 10.0.14393.3326, 2016 10.0.14393.3384, 2016 10.0.14393.3443, 2016 10.0.14393.3474, 2016 10.0.14393.3504, 2016 10.0.14393.3542, 2016 10.0.14393.3564, 2016 10.0.14393.3595, 2016 10.0.14393.3630, 2016 10.0.14393.3659, 2016 10.0.14393.3686, 2016 10.0.14393.3750, 2016 10.0.14393.3755, 2016 10.0.14393.3808, 2016 10.0.14393.3866, 2016 10.0.14393.3930, 2016 10.0.14393.3986, 2016 10.0.14393.4046, 2016 10.0.14393.4048, 2016 10.0.14393.4104, 2016 10.0.14393.4169, 2016 10.0.14393.4225, 2016 10.0.14393.4283, 2016 10.0.14393.4288, 2016 10.0.14393.4350, 2016 10.0.14393.4402, 2016 10.0.14393.4467, 2016 10.0.14393.4470, 2016 10.0.14393.4530, 2016 10.0.14393.4532, 2016 10.0.14393.4583, 2016 10.0.14393.4651, 2016 10.0.14393.4704, 2016 10.0.14393.4770, 2016 10.0.14393.4771, 2016 10.0.14393.4825, 2016 10.0.14393.4827, 2016 10.0.14393.4886, 2016 10.0.14393.4889, 2016 10.0.14393.4946, 2016 10.0.14393.5006, 2016 10.0.14393.5066, 2016 10.0.14393.5125, 2016 10.0.14393.5127, 2016 10.0.14393.5192, 2016 10.0.14393.5246, 2016 10.0.14393.5291, 2016 10.0.14393.5356, 2016 10.0.14393.5427, 2016 10.0.14393.5429, 2016 10.0.14393.5501, 2016 10.0.14393.5502, 2016 10.0.14393.5582, 2016 10.0.14393.5648, 2016 10.0.14393.5717, 2016 10.0.14393.5786, 2016 10.0.14393.5850, 2016 10.0.14393.5921, 2016 10.0.14393.5989, 2016 10.0.14393.5996, 2016 10.0.14393.6085, 2016 10.0.14393.6167, 2016 10.0.14393.6252, 2016 10.0.14393.6351, 2016 10.0.14393.6452, 2016 10.0.14393.6529, 2016 10.0.14393.6614, 2016 10.0.14393.6709, 2016 10.0.14393.6796, 2016 10.0.14393.6800, 2016 10.0.14393.6897, 2016 10.0.14393.6981, 2016 10.0.14393.7070, 2016 10.0.14393.7159, 2016 10.0.14393.7259, 2016 10.0.14393.7336, 2016 10.0.14393.7428, 2016 10.0.14393.7515, 2016 10.0.14393.7606, 2016 10.0.14393.7699, 2022 10.0.20348.202, 2022 10.0.20348.230, 2022 10.0.20348.261, 2022 10.0.20348.288, 2022 10.0.20348.320, 2022 10.0.20348.350, 2022 10.0.20348.380, 2022 10.0.20348.405, 2022 10.0.20348.407, 2022 10.0.20348.469, 2022 10.0.20348.473, 2022 10.0.20348.502, 2022 10.0.20348.524, 2022 10.0.20348.558, 2022 10.0.20348.587, 2022 10.0.20348.617, 2022 10.0.20348.643, 2022 10.0.20348.681, 2022 10.0.20348.707, 2022 10.0.20348.709, 2022 10.0.20348.740, 2022 10.0.20348.768, 2022 10.0.20348.803, 2022 10.0.20348.825, 2022 10.0.20348.859, 2022 10.0.20348.887, 2022 10.0.20348.946, 2022 10.0.20348.1006, 2022 10.0.20348.1070, 2022 10.0.20348.1129, 2022 10.0.20348.1131, 2022 10.0.20348.1194, 2022 10.0.20348.1249, 2022 10.0.20348.1251, 2022 10.0.20348.1311, 2022 10.0.20348.1366, 2022 10.0.20348.1368, 2022 10.0.20348.1487, 2022 10.0.20348.1547, 2022 10.0.20348.1607, 2022 10.0.20348.1668, 2022 10.0.20348.1726, 2022 10.0.20348.1787, 2022 10.0.20348.1850, 2022 10.0.20348.1906, 2022 10.0.20348.1970, 2022 10.0.20348.2031, 2022 10.0.20348.2113, 2022 10.0.20348.2159, 2022 10.0.20348.2227, 2022 10.0.20348.2322, 2022 10.0.20348.2333, 2022 10.0.20348.2340, 2022 10.0.20348.2342, 2022 10.0.20348.2402, 2022 10.0.20348.2458, 2022 10.0.20348.2461, 2022 10.0.20348.2522, 2022 10.0.20348.2527, 2022 10.0.20348.2582, 2022 10.0.20348.2655, 2022 10.0.20348.2695, 2022 10.0.20348.2700, 2022 10.0.20348.2762, 2022 10.0.20348.2849, 2022 10.0.20348.2908, 2022 10.0.20348.2966, 2022 10.0.20348.3091, 2022 23H2 10.0.25398.887, 2022 23H2 10.0.25398.1009, 2022 23H2 10.0.25398.1128, 2022 23H2 10.0.25398.1189, 2022 23H2 10.0.25398.1251, 2022 23H2 10.0.25398.1308, 2022 23H2 10.0.25398.1369, 2025 10.0.26100.1742, 2025 10.0.26100.2240, 2025 10.0.26100.2314, 2025 10.0.26100.2528, 2025 10.0.26100.2605, 2025 10.0.26100.2894

External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21418

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

Latest bulletins with this vulnerability

Privilege escalation in Microsoft Windows ancillary function driver for WinSock