Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-55144 [HIGH] CWE-325 CVE-2026-55144: Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering l Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering locally.

CVE-2026-83509 [HIGH] CWE-426 CVE-2026-83509: Untrusted search path in Windows Setup Files Cleanup allows an authorized attacker to elevate privil Untrusted search path in Windows Setup Files Cleanup allows an authorized attacker to elevate privileges locally.

CVE-2026-83908 [HIGH] CWE-763 CVE-2026-83908: Release of invalid pointer or reference in RPC Runtime allows an authorized attacker to elevate priv Release of invalid pointer or reference in RPC Runtime allows an authorized attacker to elevate privileges locally.

CVE-2026-88076 [HIGH] CWE-476 CVE-2026-88076: Null pointer dereference in Windows Installer allows an authorized attacker to elevate privileges lo Null pointer dereference in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-96209 [HIGH] CWE-125 CVE-2026-96209: Out-of-bounds read in Windows Network File System allows an authorized attacker to elevate privilege Out-of-bounds read in Windows Network File System allows an authorized attacker to elevate privileges locally.

CVE-2026-70212 [HIGH] CWE-923 CVE-2026-70212: Improper restriction of communication channel to intended endpoints in Windows Security Center allow Improper restriction of communication channel to intended endpoints in Windows Security Center allows an authorized attacker to elevate privileges locally.

CVE-2026-72947 [HIGH] CWE-191 CVE-2026-72947: Integer underflow (wrap or wraparound) in Windows File History Service allows an authorized attacker Integer underflow (wrap or wraparound) in Windows File History Service allows an authorized attacker to elevate privileges locally.

CVE-2026-69309 [HIGH] CWE-415 CVE-2026-69309: Double free in Windows Print Spooler Components allows an authorized attacker to elevate privileges Double free in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally.

CVE-2026-69578 [HIGH] CWE-122 CVE-2026-69578: Numeric truncation error in Windows Kernel allows an authorized attacker to elevate privileges local Numeric truncation error in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-69630 [HIGH] CWE-125 CVE-2026-69630: Out-of-bounds read in Windows Win32K allows an authorized attacker to elevate privileges locally. Out-of-bounds read in Windows Win32K allows an authorized attacker to elevate privileges locally.

CVE-2026-69617 [HIGH] CWE-125 CVE-2026-69617: Out-of-bounds read in Windows Resilient File System (ReFS) allows an authorized attacker to elevate Out-of-bounds read in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.

CVE-2026-69501 [HIGH] CWE-822 CVE-2026-69501: Untrusted pointer dereference in Windows Secure Kernel Mode allows an authorized attacker to elevate Untrusted pointer dereference in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

CVE-2026-96937 [HIGH] CWE-416 CVE-2026-96937: Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privil Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-85354 [HIGH] CWE-416 CVE-2026-85354: Use after free in Windows Error Reporting allows an authorized attacker to elevate privileges locall Use after free in Windows Error Reporting allows an authorized attacker to elevate privileges locally.

CVE-2026-26166 [HIGH] CWE-415 CVE-2026-26166: Double free in Windows Shell allows an authorized attacker to elevate privileges locally. Double free in Windows Shell allows an authorized attacker to elevate privileges locally.

CVE-2026-50297 [HIGH] CWE-284 CVE-2026-50297: Improper access control in Windows Win32K allows an authorized attacker to elevate privileges locall Improper access control in Windows Win32K allows an authorized attacker to elevate privileges locally.

CVE-2026-50325 [HIGH] CWE-284 CVE-2026-50325: Improper access control in Windows Win32K allows an authorized attacker to elevate privileges locall Improper access control in Windows Win32K allows an authorized attacker to elevate privileges locally.

CVE-2026-49805 [HIGH] CWE-284 CVE-2026-49805: Improper access control in Windows Win32K allows an authorized attacker to elevate privileges locall Improper access control in Windows Win32K allows an authorized attacker to elevate privileges locally.

CVE-2026-83510 [HIGH] CWE-367 CVE-2026-83510: Time-of-check time-of-use (toctou) race condition in Windows Setup Files Cleanup allows an authorize Time-of-check time-of-use (toctou) race condition in Windows Setup Files Cleanup allows an authorized attacker to elevate privileges locally.

CVE-2026-71347 [HIGH] CWE-362 CVE-2026-71347: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Security Center allows an authorized attacker to elevate privileges locally.