CVE-2026-42825

HighCVSS 7.0/10Last modified Nov 11, 2026

Description

Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

Metrics

CVSS 3.1 7.0/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

VendorProductVersions
MicrosoftWindows 10 Version 1607>= 10.0.14393.0, < 10.0.14393.9140
MicrosoftWindows 10 Version 1809>= 10.0.17763.0, < 10.0.17763.8755
MicrosoftWindows 10 Version 21H2>= 10.0.19044.0, < 10.0.19044.7291
MicrosoftWindows 10 Version 22H2>= 10.0.19045.0, < 10.0.19045.7417
MicrosoftWindows 11 version 23H2>= 10.0.22631.0, < 10.0.22631.7079
MicrosoftWindows 11 Version 23H2>= 10.0.22631.0, < 10.0.22631.7219
MicrosoftWindows 11 Version 24H2>= 10.0.26100.0, < 10.0.26100.8457
MicrosoftWindows 11 Version 25H2>= 10.0.26200.0, < 10.0.26200.8457
MicrosoftWindows 11 version 26H1>= 10.0.28000.0, < 10.0.28000.2113
MicrosoftWindows Server 2012>= 6.2.9200.0, < 6.2.9200.26079
MicrosoftWindows Server 2012 (Server Core installation)>= 6.2.9200.0, < 6.2.9200.26079
MicrosoftWindows Server 2012 R2>= 6.3.9600.0, < 6.3.9600.23181
MicrosoftWindows Server 2012 R2 (Server Core installation)>= 6.3.9600.0, < 6.3.9600.23181
MicrosoftWindows Server 2016>= 10.0.14393.0, < 10.0.14393.9140
MicrosoftWindows Server 2016 (Server Core installation)>= 10.0.14393.0, < 10.0.14393.9140
MicrosoftWindows Server 2019>= 10.0.17763.0, < 10.0.17763.8755
MicrosoftWindows Server 2019 (Server Core installation)>= 10.0.17763.0, < 10.0.17763.8755
MicrosoftWindows Server 2022>= 10.0.20348.0, < 10.0.20348.5139
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)>= 10.0.25398.0, < 10.0.25398.2330
MicrosoftWindows Server 2025>= 10.0.26100.0, < 10.0.26100.32860
MicrosoftWindows Server 2025 (Server Core installation)>= 10.0.26100.0, < 10.0.26100.32860

References

Timeline

Published
May 12, 2026
Last modified
Nov 11, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-428267.5Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose information over a neCVE-2026-428277.5Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclCVE-2026-428287.8Buffer over-read in Windows Projected File System Filter Driver allows an authorized attacker to elevate privileges locally.CVE-2026-428297.8Improper access control in Windows Administrator Protection allows an authorized attacker to bypass a security feature locally.CVE-2026-42839.1The WP DSGVO Tools (GDPR) plugin for WordPress is vulnerable to unauthorized account destruction in all versions up to, and including, 3.1.3CVE-2026-428306.5Untrusted search path in Azure Monitor Agent allows an authorized attacker to elevate privileges locally.CVE-2026-428317.8Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.CVE-2026-428325.5Improper access control in Microsoft Office allows an unauthorized attacker to perform spoofing locally.CVE-2026-428339.1Improper control of generation of code ('code injection') in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to execute cCVE-2026-428347.8Improper access control in Windows Admin Center allows an authorized attacker to elevate privileges over a network.CVE-2026-428358.1Improper neutralization of special elements in output used by a downstream component ('injection') in Microsoft Teams for Android allows an CVE-2026-428367.0Concurrent execution using shared resource with improper synchronization ('race condition') in Function Discovery Service (fdwsd.dll) allows
CVE-2026-42825: High severity, CVSS 7.0 | Vulnix