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CVE-2026-42979: Windows Push Notifications Elevation of Privilege Vulnerability

highCVSS 7.8CVE-2026-42979
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoftproduct: Windows Push NotificationsPrivilege escalation
What
A race condition in Windows Push Notifications allows privilege elevation.
Who is affected
Users of Windows Push Notifications are affected.
Urgency
Remediation is urgent due to the high severity rating and potential for exploitation.
Action
Patch Windows Push Notifications immediately.

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
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42979

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-2026-42979coverage & exploitation statusNVD · CVE.org

Recent advisories for Windows Push Notifications

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