Microsoft Windows 11 Version 25H2 vulnerabilities

CVE-2026-27911 [HIGH] CWE-362 CVE-2026-27911: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.

CVE-2026-73017 [HIGH] CWE-122 CVE-2026-73017: Heap-based buffer overflow in Windows Graphics Kernel allows an authorized attacker to execute code Heap-based buffer overflow in Windows Graphics Kernel allows an authorized attacker to execute code locally.

CVE-2026-20853 [HIGH] CWE-362 CVE-2026-20853: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows WalletService allows an unauthorized attacker to elevate privileges locally.

CVE-2026-97813 [MEDIUM] CWE-122 CVE-2026-97813: Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to disclose information Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to disclose information over a network.

CVE-2026-50507 [MEDIUM] CWE-306 CVE-2026-50507: Missing authentication for critical function in Windows BitLocker allows an unauthorized attacker to Missing authentication for critical function in Windows BitLocker allows an unauthorized attacker to bypass a security feature with a physical attack.

CVE-2025-24052 [HIGH] CWE-121 CVE-2025-24052: Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported Windows operating systems. This is an announcement of the upcoming removal of ltmdm64.sys driver. The driver has been removed in the October cumulative update. Fax modem hardware dependent on this specific driver will no longer work on Window

CVE-2026-72958 [HIGH] CWE-415 CVE-2026-72958: Double free in Windows Credential Guard allows an authorized attacker to elevate privileges locally. Double free in Windows Credential Guard allows an authorized attacker to elevate privileges locally.

CVE-2026-69846 [HIGH] CWE-190 CVE-2026-69846: Integer overflow or wraparound in Windows Secure Kernel Mode allows an authorized attacker to elevat Integer overflow or wraparound in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

CVE-2026-48573 [HIGH] CWE-1329 CVE-2026-48573: No cwe for this issue in Windows Secure Boot allows an authorized attacker to bypass a security feat No cwe for this issue in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

CVE-2026-48576 [HIGH] CWE-1329 CVE-2026-48576: No cwe for this issue in Windows Secure Boot allows an authorized attacker to bypass a security feat No cwe for this issue in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

CVE-2026-20875 [HIGH] CWE-476 CVE-2026-20875: Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an una Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.

CVE-2026-83516 [HIGH] CWE-125 CVE-2026-83516: Out-of-bounds read in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthori Out-of-bounds read in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.

CVE-2026-45654 [HIGH] CWE-284 CVE-2026-45654: Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security fe Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

CVE-2026-47656 [HIGH] CWE-693 CVE-2026-47656: Protection mechanism failure in Windows Boot Manager allows an authorized attacker to bypass a secur Protection mechanism failure in Windows Boot Manager allows an authorized attacker to bypass a security feature locally.

CVE-2025-60709 [HIGH] CWE-125 CVE-2025-60709: Out-of-bounds read in Windows Common Log File System Driver allows an authorized attacker to elevate Out-of-bounds read in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-44812 [HIGH] CWE-190 CVE-2026-44812: Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute c Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

CVE-2026-44803 [HIGH] CWE-190 CVE-2026-44803: Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute c Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

CVE-2026-57095 [HIGH] CWE-200 CVE-2026-57095: Exposure of sensitive information to an unauthorized actor in Windows Win32K allows an unauthorized Exposure of sensitive information to an unauthorized actor in Windows Win32K allows an unauthorized attacker to elevate privileges locally.

CVE-2026-20832 [HIGH] CWE-415 CVE-2026-20832: Windows Remote Procedure Call Interface Definition Language (IDL) Elevation of Privilege Vulnerabili Windows Remote Procedure Call Interface Definition Language (IDL) Elevation of Privilege Vulnerability

CVE-2026-20857 [HIGH] CWE-822 CVE-2026-20857: Untrusted pointer dereference in Windows Cloud Files Mini Filter Driver allows an authorized attacke Untrusted pointer dereference in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.