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CVE-2026-50426: Windows DNS Server Remote Code Execution Vulnerability

mediumCVSS 6.8CVE-2026-50426
Relative path traversal in DNS Server allows an authorized attacker to execute code over an adjacent network.

CSIRTS triage

vendor: Microsoftproduct: Windows DNS ServerRemote code execution
What
Relative path traversal in DNS Server allows an authorized attacker to execute code over an adjacent network.
Who is affected
Deployments of Windows DNS Server.
Urgency
Remediation is medium urgency due to the risk of remote code execution.
Action
Update Windows DNS Server with the latest security patches.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 6.8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50426

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-2026-50426coverage & 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.

More from Microsoft Security Response Center