#VU105518 Input validation error in Windows and Windows Server - CVE-2025-26633
Vulnerability identifier: #VU105518
Vulnerability risk: Critical
CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
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 remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input in Microsoft Management Console. A remote attacker can trick the victim into opening a specially crafted file and execute arbitrary code on the target system.
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 10.0.19044.5487, 10 22H2 10.0.19041.3920 - 10 22H2 10.0.19045.5487, 10 1507 10.0.10240.1643 - 10 1507 10.0.10240.20915, 10 1607 10.0.14393.10 - 10 1607 10.0.14393.7785, 10 1809 10.0.17763.1 - 10 1809 10.0.17763.6893, 11 22H2 10.0.22449.1000 - 11 22H2 10.0.22621.4890, 11 23H2 10.0.22631.1825 - 11 23H2 10.0.22631.4890, 11 24H2 10.0.26052.1000 - 11 24H2 10.0.26100.3194
Windows Server: 2008 R2 SP1 - 2008 6.0.6003.23117, 2012 Gold - 2012 6.2.9200.25317, 2016 10.0.14393.10 - 2016 10.0.14393.7785, 2019 10.0.17763.1 - 2019 10.0.17763.6893, 2022 10.0.20348.202 - 2022 23H2 10.0.25398.1425, 2025 10.0.26100.1742 - 2025 10.0.26100.3194
External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-26633
https://www.zerodayinitiative.com/advisories/ZDI-25-150/
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?
Yes. This vulnerability is being exploited in the wild.
