Race Condition Vulnerability in Windows Push Notifications by Microsoft
CVE-2026-42977

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows 10 Version 21h2
Windows 10 Version 22h2
Windows 11 Version 23h2
Vendor
CVE Published:
9 June 2026

What is CVE-2026-42977?

A race condition in Windows Push Notifications has been identified, allowing an authorized attacker to exploit improper synchronization of shared resources. This vulnerability can lead to local privilege escalation, enabling attackers to gain higher access levels within the affected Windows operating environments. Systems running Windows 10, Windows Server 2016, Windows Server 2019, and Windows 11 are impacted, prompting the necessity for users to apply the latest security updates to mitigate potential risks.

Affected Version(s)

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.8880

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7417

Windows 10 Version 22H2 32-bit Systems 10.0.19045.0 < 10.0.19045.7417

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.