CVE-2026-62878

Windows DNS Server Remote Code Execution Vulnerability

Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.

Affected

Microsoft · Windows Server 2012 · Windows Server 2012 (Server Core installation) · Windows Server 2012 R2 · Windows Server 2012 R2 (Server Core installation) · Windows Server 2016 · Windows Server 2016 (Server Core installation)

CVSS v3.1 MICROSOFT

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.97% chance of exploitation in the next 30 days, 61st percentile

Published

2026-08-11

Updated

2026-10-08

Proof-of-concept exploits (1)

• nmlz/CVE-2026-628781★ · 2026-09-24

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62878

References

• CVE Record
• NVD entry