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CVE-2026-49169: Windows DNS Server Remote Code Execution Vulnerability

highCVSS 8CVE-2026-49169
Use after free in DNS Server allows an authorized attacker to execute code over a network.

CSIRTS triage

vendor: Microsoftproduct: Windows DNS ServerRemote code execution
What
A use after free vulnerability in DNS Server allows an authorized attacker to execute code over a network.
Who is affected
Deployments of Windows DNS Server.
Urgency
Remediation is high urgency due to the potential for remote code execution.
Action
Apply patches provided by Microsoft for Windows DNS Server.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49169

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-49169coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Windows DNS Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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