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4 CVEs HIGH CVSS 7.8

Windows Push Notifications Race Condition EoP

2026-06-09

CVE-2026-42977 HIGH PATCH

Local privilege escalation in Windows Push Notifications enables an authenticated low-privileged user to elevate to higher privileges by exploiting a race condition (CWE-362) in concurrent access to a shared resource. Successful exploitation results in high impact to confidentiality, integrity, and availability with scope change, but no public exploit identified at time of analysis. Microsoft has released a patch via MSRC advisory.

7.8
CVSS
0.0%
EPSS
CVE-2026-42978 HIGH PATCH

Local privilege escalation in Microsoft Windows Push Notifications service stems from a race condition (CWE-362) in concurrent handling of shared resources, allowing an authorized low-privileged attacker to win a timing window and elevate to higher privileges with scope change. The CVSS 3.1 vector AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H reflects local-only exploitation with high attack complexity due to the timing-dependent nature, but a successful attacker gains full confidentiality, integrity, and availability impact across a security boundary. No public exploit identified at time of analysis.

7.8
CVSS
0.0%
EPSS
CVE-2026-42979 HIGH PATCH

Local privilege escalation in Microsoft Windows Push Notifications service stems from a race condition (CWE-362) that an attacker with low-privileged local access can exploit to gain higher privileges. No public exploit identified at time of analysis, and the issue is not on CISA KEV, but the CVSS 7.8 rating reflects high impact across confidentiality, integrity, and availability once the race is won. A vendor patch is available via the Microsoft Security Response Center advisory.

7.8
CVSS
0.0%
EPSS
CVE-2026-42991 HIGH PATCH

Local privilege escalation in Microsoft Windows Push Notifications service stems from a race condition (CWE-362) that an authenticated low-privilege user can win to gain higher privileges on the host. The CVSS 7.8 score with Scope:Changed indicates successful exploitation crosses a security boundary, impacting confidentiality, integrity, and availability of resources beyond the vulnerable component. No public exploit identified at time of analysis, and the vulnerability is not listed in CISA KEV.

7.8
CVSS
0.0%
EPSS

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