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Microsoft update

KB5087420

Security Update

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Fixed in

Fixes 55 records

Priority MEDIUM 54

Heap-based buffer overflow in Microsoft Windows DNS allows an unauthorized attacker to execute code over a network.

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.02695 Published 2026-05-12 Fixed in 10.0.22631.7079, 10.0.22631.7219 +5 CWE-122
Priority MEDIUM 42

Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.

CVSS 3.1CRITICAL 9.3 Local No auth No interaction EPSS 0.00332 Published 2026-05-12 Fixed in 10.0.22631.7079, 10.0.22631.7219 +1 CWE-416
Priority MEDIUM 41

Use after free in Windows TCP/IP allows an unauthorized attacker to disclose information over a network.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00931 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-416
Priority MEDIUM 41

Heap-based buffer overflow in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.02665 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-122
Priority MEDIUM 41

Missing release of memory after effective lifetime in Windows Internet Key Exchange (IKE) Protocol allows an unauthorized attacker to deny service over a network.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.01187 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-401
Priority MEDIUM 40

Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally.

CVSS 3.1HIGH 8.8 Local Low privileges No interaction EPSS 0.00427 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-122
Priority MEDIUM 40

Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over an adjacent network.

CVSS 3.1HIGH 8.8 Adjacent network No auth No interaction EPSS 0.00461 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-122
Priority MEDIUM 40

Heap-based buffer overflow in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.01838 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-122
Priority LOW 39

Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network.

CVSS 3.1HIGH 8.1 Network No auth No interaction EPSS 0.00789 Published 2026-05-12 Fixed in 10.0.17763.8755, 10.0.19044.7291 +9 CWE-416
Priority LOW 37

Windows TCP/IP Denial of Service Vulnerability

CVSS 3.1HIGH 7.1 Local No auth No interaction EPSS 0.00331 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-476
Priority LOW 37

Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code locally.

CVSS 3.1HIGH 7.8 Local No auth User interaction EPSS 0.00532 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-122
Priority LOW 36

Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00298 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-416
Priority LOW 36

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00328 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +10 CWE-121
Priority LOW 36

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

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00249 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-416
Priority LOW 36

Heap-based buffer overflow in Windows Cryptographic Services allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00304 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-122
Priority LOW 36

Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00345 Published 2026-05-12 Fixed in 10.0.17763.8755, 10.0.19044.7291 +9 CWE-843
Priority LOW 36

Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.01647 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-416
Priority LOW 36

Integer overflow or wraparound in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00332 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +11 CWE-190
Priority LOW 36

Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00314 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-843
Priority LOW 36

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

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00249 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-416
Priority LOW 36

Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00245 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +10 CWE-122
Priority LOW 36

Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00298 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-190
TI-2026-26617 CVE-2026-34330 · GHSA-5crp-wxv7-m6gx

Win32k Elevation of Privilege Vulnerability

Priority LOW 36

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00304 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-190
Priority LOW 36

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.0031 Published 2026-05-12 Fixed in 10.0.19044.7291, 10.0.19045.7417 +8 CWE-122
Priority LOW 36

Improper access control in Windows Event Logging Service allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00272 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-284
Priority LOW 35

Reliance on a component that is not updateable in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

CVSS 3.1MEDIUM 6.7 Local High privileges No interaction EPSS 0.01421 Published 2026-05-12 Fixed in 10.0.17763.8755, 10.0.19044.7291 +9 CWE-1329
Priority LOW 35

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00205 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-362
Priority LOW 35

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00154 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-362
Priority LOW 35

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Native WiFi Miniport Driver allows an unauthorized attacker to execute code over an adjacent network.

CVSS 3.1HIGH 7.5 Adjacent network No auth No interaction EPSS 0.00297 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-362
Priority LOW 33

Windows TCP/IP Denial of Service Vulnerability

CVSS 3.1HIGH 7.4 Adjacent network No auth No interaction EPSS 0.00528 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-476
Priority LOW 33

Windows TCP/IP Denial of Service Vulnerability

CVSS 3.1HIGH 7.4 Adjacent network No auth No interaction EPSS 0.00401 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-476
Priority LOW 33

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.0029 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-362
Priority LOW 32

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

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.00226 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-416
Priority LOW 32

Use after free in Windows SMB Client allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.00243 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +11 CWE-416
Priority LOW 32

Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.00261 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-416
Priority LOW 32

Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.00204 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +10 CWE-362
Priority LOW 32

Use after free in Windows Projected File System allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.00207 Published 2026-05-12 Fixed in 10.0.17763.8755, 10.0.19044.7291 +9 CWE-416
TI-2026-26618 CVE-2026-34331 · GHSA-58r5-75pr-v3g7

Win32k Elevation of Privilege Vulnerability

Priority LOW 32

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.0019 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-362
TI-2026-26205 CVE-2026-33839 · GHSA-3mv2-86j6-x44q

Win32k Elevation of Privilege Vulnerability

Priority LOW 32

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.0019 Published 2026-05-12 Fixed in 10.0.17763.8755, 10.0.19044.7291 +9 CWE-362
Priority LOW 32

Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally.

CVSS 3.1MEDIUM 6.7 Local Low privileges User interaction EPSS 0.00319 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-415
Priority LOW 32

Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally.

CVSS 3.1MEDIUM 6.7 Local Low privileges User interaction EPSS 0.00319 Published 2026-05-12 Fixed in https://aka.ms/OfficeSecurityReleases, 16.0.5556.1000 +14 CWE-415
Priority LOW 30

Authentication bypass using an alternate path or channel in Windows TCP/IP allows an authorized attacker to bypass a security feature over a network.

CVSS 3.1MEDIUM 6.5 Network Low privileges No interaction EPSS 0.00614 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-288
Priority LOW 26

Out-of-bounds read in Telnet Client allows an unauthorized attacker to disclose information over a network.

CVSS 3.1MEDIUM 5.4 Network No auth User interaction EPSS 0.00747 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-125
Priority LOW 20

Improper access control in Windows Filtering Platform (WFP) allows an authorized attacker to bypass a security feature locally.

CVSS 3.1MEDIUM 4.4 Local Low privileges No interaction EPSS 0.00204 Published 2026-05-12 Fixed in 10.0.14393.9140, 10.0.17763.8755 +12 CWE-284