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CVE-2026-20827: Tablet Windows User Interface (TWINUI) Subsystem Information Disclosure Vulnerability

Exposure of sensitive information to an unauthorized actor in Tablet Windows User Interface (TWINUI) Subsystem allows an authorized attacker to disclose information locally.

Microsoft Security Response Center
#vulnerability#windows#auth#Tablet Windows User Interface (TWINUI) Subsystem#Security Vulnerability
CVE-2026-20826: Tablet Windows User Interface (TWINUI) Subsystem Information Disclosure Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Tablet Windows User Interface (TWINUI) Subsystem allows an authorized attacker to elevate privileges locally.

CVE-2026-20831: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Time-of-check time-of-use (toctou) race condition in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-20828: Windows rndismp6.sys Information Disclosure Vulnerability

Out-of-bounds read in Windows Internet Connection Sharing (ICS) allows an unauthorized attacker to disclose information with a physical attack.

CVE-2026-20833: Windows Kerberos Information Disclosure Vulnerability

Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.

CVE-2026-20949: Microsoft Excel Security Feature Bypass Vulnerability

Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.