SB2026061120 - Multiple vulnerabilities in Microsoft Windows Push Notifications
Published: June 11, 2026 Updated: June 11, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 vulnerabilities.
1) Race condition (CVE-ID: CVE-2026-42978)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in Windows Push Notifications. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
2) Race condition (CVE-ID: CVE-2026-42991)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in Windows Push Notifications. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
3) Race condition (CVE-ID: CVE-2026-42979)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in Windows Push Notifications. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
4) Race condition (CVE-ID: CVE-2026-42977)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in Windows Push Notifications. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
5) Information disclosure (CVE-ID: CVE-2026-42971)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to bypass certain security restrictions.
The vulnerability exists due to usage of uninitialized resources in Windows Push Notification. A local user can trigger uninitialized usage of resources and gain access to sensitive information on the system.
6) Information disclosure (CVE-ID: CVE-2026-42973)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to bypass certain security restrictions.
The vulnerability exists due to usage of uninitialized resources in Windows Push Notification. A local user can trigger uninitialized usage of resources and gain access to sensitive information on the system.
7) Information disclosure (CVE-ID: CVE-2026-42970)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to bypass certain security restrictions.
The vulnerability exists due to usage of uninitialized resources in Windows Push Notification. A local user can trigger uninitialized usage of resources and gain access to sensitive information on the system.
8) Use of uninitialized resource (CVE-ID: CVE-2026-42969)
CWE-ID: CWE-908 - Use of Uninitialized Resource
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to bypass certain security restrictions.
The vulnerability exists due to usage of uninitialized resources in Windows Push Notification. A local user can trigger uninitialized usage of resources and gain access to sensitive information on the system.
Remediation
Install update from vendor's website.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42978
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42991
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42979
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42977
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42971
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42973
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42970
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42969