HIGHCVE-2026-26154Published Modified CNA microsoft
CVE-2026-26154: Windows Server Update Service (WSUS) Tampering Vulnerability
Improper input validation in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.
Metrics
- CVSS v3.1
- 7.5
- Severity
- HIGH
- Fixed in
- 6.2.9200.26026
- Affected Products
- 12
Fix available
6.2.9200.260266.3.9600.2313210.0.14393.906010.0.17763.864410.0.20348.502010.0.25398.227410.0.26100.32690
Affected packages
- Microsoft / Windows Server 2012< 6.2.9200.26026 (from 6.2.9200.0)
- Microsoft / Windows Server 2012 (Server Core installation)< 6.2.9200.26026 (from 6.2.9200.0)
- Microsoft / Windows Server 2012 R2< 6.3.9600.23132 (from 6.3.9600.0)
- Microsoft / Windows Server 2012 R2 (Server Core installation)< 6.3.9600.23132 (from 6.3.9600.0)
- Microsoft / Windows Server 2016< 10.0.14393.9060 (from 10.0.14393.0)
- Microsoft / Windows Server 2016 (Server Core installation)< 10.0.14393.9060 (from 10.0.14393.0)
- Microsoft / Windows Server 2019< 10.0.17763.8644 (from 10.0.17763.0)
- Microsoft / Windows Server 2019 (Server Core installation)< 10.0.17763.8644 (from 10.0.17763.0)
- Microsoft / Windows Server 2022< 10.0.20348.5020 (from 10.0.20348.0)
- Microsoft / Windows Server 2022, 23H2 Edition (Server Core installation)< 10.0.25398.2274 (from 10.0.25398.0)
- Microsoft / Windows Server 2025< 10.0.26100.32690 (from 10.0.26100.0)
- Microsoft / Windows Server 2025 (Server Core installation)< 10.0.26100.32690 (from 10.0.26100.0)
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C