CVE tracker / CVE-2026-81384
CVE-2026-81384
CVE-2026-81384 is the Windows DNS Server Remote Code Execution Vulnerability. Microsoft rates it Important, CVSS 8.1. It is not in CISA's Known Exploited Vulnerabilities catalog. Published November 10, 2026.
Risk summary
HighRemote Code Execution
8.1
CVSS v3 base
High
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV
Microsoft describes it: “Heap-based buffer overflow in DNS Server allows an unauthorized attacker to execute code over a network.”
How to fix it
Microsoft lists 4 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 - KB5131090 · fixed build 10.0.20348.5870
Windows Server 2022 (Server Core installation), Windows Server 2022
What Microsoft changed
- November 10, 2026: Information published.
Details
- Weakness
- CWE-122: Heap-based Buffer Overflow
- 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.