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CVE-2026-50364: Windows Backup Service Elevation of Privilege Vulnerability

highCVSS 7.3CVE-2026-50364
Improper link resolution before file access ('link following') in Windows Server Backup allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoftproduct: Windows Server BackupPrivilege escalation
What
Improper link resolution before file access ('link following') in Windows Server Backup allows an authorized attacker to elevate privileges locally.
Who is affected
Authorized users of Windows Server Backup.
Urgency
Remediation is high urgency due to the potential for local privilege escalation, though it is not currently exploited.
Action
Apply the latest security patches provided by Microsoft.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.3
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50364

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-2026-50364coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Windows Backup Service

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