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CVE-2026-50498: Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability

highCVSS 7.8CVE-2026-50498

CSIRTS triage

vendor: Microsoftproduct: Windows Universal Disk Format File System DriverPrivilege escalation
What
Elevation of privilege vulnerability in Windows Universal Disk Format File System Driver.
Who is affected
Authorized users of the affected driver.
Urgency
Remediation is urgent due to the high severity of the vulnerability.
Action
Update to the latest version of the Windows Universal Disk Format File System Driver.

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 7.8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50498

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-2026-50498coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Windows Universal Disk

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