#VU102670 Type Confusion in Windows Server - CVE-2025-21225
Vulnerability identifier: #VU102670
Vulnerability risk: Medium
CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID:
CWE-ID:
CWE-843
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Windows Server
Operating systems & Components /
Operating system
Vendor: Microsoft
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a type confusion error in Windows Remote Desktop Gateway (RD Gateway). A remote attacker can pass specially crafted data to the application, trigger a type confusion error and cause a denial of service on the target system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Windows Server: 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, 2019 10.0.17763.1, 2019 10.0.17763.55, 2019 10.0.17763.107, 2019 10.0.17763.134, 2019 10.0.17763.168, 2019 10.0.17763.194, 2019 10.0.17763.195, 2019 10.0.17763.253, 2019 10.0.17763.292, 2019 10.0.17763.316, 2019 10.0.17763.348, 2019 10.0.17763.379, 2019 10.0.17763.404, 2019 10.0.17763.437, 2019 10.0.17763.439, 2019 10.0.17763.475, 2019 10.0.17763.503, 2019 10.0.17763.504, 2019 10.0.17763.529, 2019 10.0.17763.557, 2019 10.0.17763.592, 2019 10.0.17763.593, 2019 10.0.17763.615, 2019 10.0.17763.652, 2019 10.0.17763.678, 2019 10.0.17763.720, 2019 10.0.17763.737, 2019 10.0.17763.740, 2019 10.0.17763.774, 2019 10.0.17763.775, 2019 10.0.17763.805, 2019 10.0.17763.832, 2019 10.0.17763.864, 2019 10.0.17763.914, 2019 10.0.17763.973, 2019 10.0.17763.1012, 2019 10.0.17763.1039, 2019 10.0.17763.1075, 2019 10.0.17763.1098, 2019 10.0.17763.1131, 2019 10.0.17763.1132, 2019 10.0.17763.1158, 2019 10.0.17763.1192, 2019 10.0.17763.1217, 2019 10.0.17763.1282, 2019 10.0.17763.1294, 2019 10.0.17763.1339, 2019 10.0.17763.1369, 2019 10.0.17763.1397, 2019 10.0.17763.1432, 2019 10.0.17763.1457, 2019 10.0.17763.1490, 2019 10.0.17763.1518, 2019 10.0.17763.1554, 2019 10.0.17763.1577, 2019 10.0.17763.1579, 2019 10.0.17763.1613, 2019 10.0.17763.1637, 2019 10.0.17763.1697, 2019 10.0.17763.1728, 2019 10.0.17763.1757, 2019 10.0.17763.1790, 2019 10.0.17763.1817, 2019 10.0.17763.1821, 2019 10.0.17763.1823, 2019 10.0.17763.1852, 2019 10.0.17763.1879, 2019 10.0.17763.1911, 2019 10.0.17763.1935, 2019 10.0.17763.1971, 2019 10.0.17763.1999, 2019 10.0.17763.2028, 2019 10.0.17763.2029, 2019 10.0.17763.2061, 2019 10.0.17763.2090, 2019 10.0.17763.2091, 2019 10.0.17763.2114, 2019 10.0.17763.2145, 2019 10.0.17763.2183, 2019 10.0.17763.2213, 2019 10.0.17763.2237, 2019 10.0.17763.2268, 2019 10.0.17763.2300, 2019 10.0.17763.2305, 2019 10.0.17763.2330, 2019 10.0.17763.2366, 2019 10.0.17763.2369, 2019 10.0.17763.2452, 2019 10.0.17763.2458, 2019 10.0.17763.2510, 2019 10.0.17763.2565, 2019 10.0.17763.2628, 2019 10.0.17763.2686, 2019 10.0.17763.2746, 2019 10.0.17763.2803, 2019 10.0.17763.2867, 2019 10.0.17763.2928, 2019 10.0.17763.2931, 2019 10.0.17763.2989, 2019 10.0.17763.3046, 2019 10.0.17763.3113, 2019 10.0.17763.3165, 2019 10.0.17763.3232, 2019 10.0.17763.3287, 2019 10.0.17763.3346, 2019 10.0.17763.3406, 2019 10.0.17763.3469, 2019 10.0.17763.3532, 2019 10.0.17763.3534, 2019 10.0.17763.3650, 2019 10.0.17763.3653, 2019 10.0.17763.3770, 2019 10.0.17763.3772, 2019 10.0.17763.3887, 2019 10.0.17763.4010, 2019 10.0.17763.4131, 2019 10.0.17763.4252, 2019 10.0.17763.4377, 2019 10.0.17763.4499, 2019 10.0.17763.4645, 2019 10.0.17763.4737, 2019 10.0.17763.4851, 2019 10.0.17763.4974, 2019 10.0.17763.5122, 2019 10.0.17763.5206, 2019 10.0.17763.5329, 2019 10.0.17763.5458, 2019 10.0.17763.5576, 2019 10.0.17763.5579, 2019 10.0.17763.5696, 2019 10.0.17763.5820, 2019 10.0.17763.5936, 2019 10.0.17763.6054, 2019 10.0.17763.6189, 2019 10.0.17763.6293, 2019 10.0.17763.6414, 2019 10.0.17763.6532, 2019 10.0.17763.6659, 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 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, 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
External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21225
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
