#VU102800 Creation of temporary file in directory with insecure permissions in Microsoft products - CVE-2025-21173
Vulnerability identifier: #VU102800
Vulnerability risk: Low
CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-379
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
.NET
Other software /
Other software solutions
.NET for Linux
Universal components / Libraries /
Software for developers
Visual Studio
Universal components / Libraries /
Software for developers
Vendor: Microsoft
Description
The vulnerability allows a local user to escalate privilege on the target system.
The vulnerability exists due to creation of temporary file in directory with insecure permissions in .NET. A local user can overwrite arbitrary file content and gain elevated privileges on the system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
.NET: 8.0.0, 9.0.0
.NET for Linux: 8.0.0, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.0.5, 8.0.6, 8.0.7, 8.0.8, 8.0.9, 8.0.10, 8.0.11, 9.0.0
Visual Studio: 17.1.0 17.1.32210.238, 17.1.1 17.1.32228.430, 17.1.2 17.1.32319.34, 17.1.3 17.1.32328.378, 17.1.4 17.1.32407.343, 17.1.5 17.1.32414.318, 17.1.6 17.1.32421.90, 17.1.7 17.1.32428.221, 17.6.0 17.6.33712.159, 17.6.1 17.6.33717.318, 17.6.2 17.6.33723.286, 17.6.3 17.6.33801.468, 17.6.4 17.6.33815.320, 17.6.5 17.6.33829.357, 17.6.6 17.6.33927.249, 17.6.7 17.6.34031.178, 17.6.8 17.6.34202.202, 17.6.9 17.6.34221.33, 17.6.10 17.6.34302.98, 17.6.11 17.6.34408.137, 17.6.12 17.6.34601.182, 17.6.13 17.6.34701.35, 17.6.14 17.6.34728.177, 17.6.15 17.6.34902.100, 17.6.16 17.6.34931.59, 17.6.17 17.6.35028.176, 17.6.18 17.6.35201.154, 17.6.19 17.6.35230.93, 17.6.20 17.6.35326.246, 17.6.21 17.6.35430.205, 17.8.0 17.8.34309.116, 17.8.1 17.8.34316.72, 17.8.2 17.8.34322.80, 17.8.3 17.8.34330.188, 17.8.4 17.8.34408.163, 17.8.5 17.8.34511.84, 17.8.6 17.8.34525.116, 17.8.7 17.8.34601.278, 17.8.8 17.8.34701.33, 17.8.9 17.8.34728.176, 17.8.10 17.8.34902.127, 17.8.11 17.8.34931.61, 17.8.12 17.8.35027.43, 17.8.13 17.8.35201.163, 17.8.14 17.8.35230.98, 17.8.15 17.8.35326.199, 17.8.16 17.8.35430.204, 17.10.0 17.10.34916.146, 17.10.1 17.10.34928.147, 17.10.2 17.10.35004.147, 17.10.3 17.10.35013.160, 17.10.4 17.10.35027.167, 17.10.5 17.10.35122.118, 17.10.6 17.10.35201.131, 17.10.7 17.10.35230.96, 17.10.8 17.10.35326.205, 17.10.9 17.10.35431.56
External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21173
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?
No. We are not aware of malware exploiting this vulnerability.
