CVE-2026-49169: Microsoft Windows Server 2025

Windows DNS Server Remote Code Execution Vulnerability

CVSS 8.0 HighEPSS 0.0075 · 55th percentile

Published by the CVE Program (CNA: microsoft) at 14 Jul 2026, 17:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft	Windows Server 2025	affected 10.0.26100.0 to before 10.0.26100.33158 custom
Microsoft	Windows Server 2025 (Server Core installation)	affected 10.0.26100.0 to before 10.0.26100.33158 custom

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Microsoft Windows Server 2025 (including Server Core installations) versions from 10.0.26100.0 before 10.0.26100.33158 contain a use-after-free flaw in the DNS Server component. An authorized attacker on the network can exploit it to execute code. Upgrade to 10.0.26100.33158 or later.

Written 13 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.0	High	3.1	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C	CNA (microsoft)

CISA KEV Not listed.
EPSS 0.0075, the 55th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

14 Jul 2026, 17:04 UTC Confirmed by the CVE List

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49169 vendor-advisorypatch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.