Microsoft Windows Server 2012 R2 vulnerabilities

2,562 known vulnerabilities affecting microsoft/windows_server_2012_r2.

Total CVEs

2,562

CISA KEV

actively exploited

Public exploits

Exploited in wild

Severity breakdown

CRITICAL86HIGH1814MEDIUM653LOW9

Vulnerabilities

Page 2 of 129

CVE-2026-33834HIGHCVSS 7.8≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-33834 [HIGH] CWE-284 CVE-2026-33834: Improper access control in Windows Event Logging Service allows an authorized attacker to elevate pr Improper access control in Windows Event Logging Service allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-40406HIGHCVSS 7.5≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-40406 [HIGH] CWE-416 CVE-2026-40406: Use after free in Windows TCP/IP allows an unauthorized attacker to disclose information over a netw Use after free in Windows TCP/IP allows an unauthorized attacker to disclose information over a network.

nvd

CVE-2026-40382HIGHCVSS 7.8≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-40382 [HIGH] CWE-416 CVE-2026-40382: Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges loca Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-35416HIGHCVSS 7.0≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-35416 [HIGH] CWE-416 CVE-2026-35416: Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver f Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-40397HIGHCVSS 7.8≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-40397 [HIGH] CWE-191 CVE-2026-40397: Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-35421HIGHCVSS 7.8≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-35421 [HIGH] CWE-122 CVE-2026-35421: Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows GDI allows an unauthorized attacker to execute code locally.

nvd

CVE-2026-40414HIGHCVSS 7.4≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-40414 [HIGH] CWE-476 CVE-2026-40414: Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over an a Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over an adjacent network.

nvd

CVE-2026-34342HIGHCVSS 7.0≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-34342 [HIGH] CWE-362 CVE-2026-34342: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-35420HIGHCVSS 7.8≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-35420 [HIGH] CWE-122 CVE-2026-35420: Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges loc Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-34331HIGHCVSS 7.0≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-34331 [HIGH] CWE-362 CVE-2026-34331: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-34344HIGHCVSS 7.8≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-34344 [HIGH] CWE-843 CVE-2026-34344: Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver f Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-34334HIGHCVSS 7.0≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-34334 [HIGH] CWE-362 CVE-2026-34334: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-40413HIGHCVSS 7.4≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-40413 [HIGH] CWE-476 CVE-2026-40413: Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over an a Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over an adjacent network.

nvd

CVE-2026-40407HIGHCVSS 7.8≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-40407 [HIGH] CWE-122 CVE-2026-40407: Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-34351HIGHCVSS 7.0≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-34351 [HIGH] CWE-362 CVE-2026-34351: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-42825HIGHCVSS 7.0≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-42825 [HIGH] CWE-416 CVE-2026-42825: Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges loca Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-35422MEDIUMCVSS 6.5≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-35422 [MEDIUM] CWE-288 CVE-2026-35422: Authentication bypass using an alternate path or channel in Windows TCP/IP allows an authorized atta Authentication bypass using an alternate path or channel in Windows TCP/IP allows an authorized attacker to bypass a security feature over a network.

nvd

CVE-2026-32170MEDIUMCVSS 6.7≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-32170 [MEDIUM] CWE-415 CVE-2026-32170: Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally. Double free in Windows Rich Text Edit allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-32209MEDIUMCVSS 4.4≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-32209 [MEDIUM] CWE-284 CVE-2026-32209: Improper access control in Windows Filtering Platform (WFP) allows an authorized attacker to bypass Improper access control in Windows Filtering Platform (WFP) allows an authorized attacker to bypass a security feature locally.

nvd

CVE-2026-35423MEDIUMCVSS 5.4≥ 6.3.9600.0, < 6.3.9600.231812026-05-12

CVE-2026-35423 [MEDIUM] CWE-125 CVE-2026-35423: Out-of-bounds read in Telnet Client allows an unauthorized attacker to disclose information over a n Out-of-bounds read in Telnet Client allows an unauthorized attacker to disclose information over a network.

nvd

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