PatchTheCVEWindows Server 2025: security updates (KB) and vulnerabilities
3 KB updates fix 7 tracked CVEs for Windows Server 2025.
Windows Server 2025 has 7 tracked vulnerabilities, 0 critical and 1 exploited in the wild (CISA KEV). A fixed release or vendor patch exists for 7. Most recent: 2026-10-13. Highest priority: CVE-2026-81963 (score 65/100).
- CVE-2026-81963 HIGH 7.8 EXPLOITED UPGRADE UPGRADE Microsoft Windows Link Following Vulnerability
- CVE-2026-96958 HIGH 7.5 UPGRADE DOWNGRADE Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.
- CVE-2026-69733 HIGH 7.8 UPGRADE UPGRADE Untrusted search path in Windows Update allows an authorized attacker to elevate privileges locally.
- CVE-2026-85790 MEDIUM 5.9 UPGRADE UPGRADE Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
- CVE-2026-69673 HIGH 7.8 UPGRADE UPGRADE Improper link resolution before file access ('link following') in Windows Update allows an authorized attacker
- CVE-2026-69718 HIGH 7.8 UPGRADE UPGRADE Improper neutralization of special elements used in a command ('command injection') in Windows Update allows a
- CVE-2026-96912 HIGH 7.8 UPGRADE UPGRADE Use after free in Windows Client License Service allows an authorized attacker to elevate privileges locally.
FAQ
How do I fix Windows Server 2025 vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is Windows Server 2025 being exploited right now?
Yes: 1 Windows Server 2025 CVE is on the CISA Known Exploited Vulnerabilities list, so patch it first.
Which Windows Server 2025 CVE should I patch first?
CVE-2026-81963 currently ranks highest (65/100): Microsoft Windows Link Following Vulnerability.
Security updates (KB) for Windows Server 2025
| KB | Fixed build | CVEs fixed | Newest CVE |
|---|---|---|---|
| KB5126646 | 10.0.26100.33650 | 5 | 2026-10-13 |
| KB5127690 | 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 | 1 | 2026-10-13 |
| KB5122871 | 10.0.26100.33438 | 1 | 2026-09-08 |
Install the KB from Windows Update, then verify with Get-HotFix -Id KBxxxxxxx or winver. Fixed build is the OS build number after the update.