CVE tracker / CVE-2026-113859
CVE-2026-113859
CVE-2026-113859 is the Windows TCP/IP Remote Code Execution Vulnerability. Microsoft rates it Critical, CVSS 7.5. It is not in CISA's Known Exploited Vulnerabilities catalog. Published November 10, 2026.
Risk summary
HighRemote Code Execution
7.5
CVSS v3 base
High
Severity
Critical
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV
Microsoft describes it: “Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over an adjacent network.”
How to fix it
Microsoft lists 10 affected products and the update that fixes each:
- KB5131077 · fixed build 10.0.26100.33730
Windows Server 2025 (Server Core installation), Windows Server 2025 - KB5131080 · fixed build 10.0.26100.33822
Windows Server 2025 (Server Core installation), Windows Server 2025 - KB5132043 · fixed builds 10.0.26300.9911, 10.0.26200.9911, 10.0.26100.9911
Windows 11 Version 26H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, and 1 more - KB5132059 · fixed build 10.0.28000.3501
Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems - KB5132061 · fixed builds 10.0.26300.9974, 10.0.26200.9974, 10.0.26100.9974
Windows 11 Version 26H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, and 1 more
What Microsoft changed
- November 10, 2026: Information published.
Details
- Weakness
- CWE-416: Use After Free
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- November 10, 2026
- Last revised
- November 10, 2026
Get told when this changes
Senserva Watch emails Microsoft security and patch alerts when something moves: a new exploitation report, a revised fix, a known issue. Free, one email address.
References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.