Microsoft Windows Server 2016 vulnerabilities

4,181 known vulnerabilities affecting microsoft/windows_server_2016.

Total CVEs

4,181

CISA KEV

116

actively exploited

Public exploits

119

Exploited in wild

109

Severity breakdown

CRITICAL114HIGH2918MEDIUM1130LOW19

Vulnerabilities

Page 8 of 210

CVE-2026-21249LOWCVSS 3.3fixed in 10.0.14393.8868≥ 10.0.14393.0, < 10.0.14393.88682026-02-10

CVE-2026-21249 [LOW] CWE-73 CVE-2026-21249: External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spo External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing locally.

cvelistv5nvd

CVE-2026-20836HIGHCVSS 7.0fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20836 [HIGH] CWE-362 CVE-2026-20836: Concurrent execution using shared resource with improper synchronization ('race condition') in Graph Concurrent execution using shared resource with improper synchronization ('race condition') in Graphics Kernel allows an authorized attacker to elevate privileges locally.

cvelistv5nvd

CVE-2026-20919HIGHCVSS 7.5fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20919 [HIGH] CWE-362 CVE-2026-20919: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

cvelistv5nvd

CVE-2026-20840HIGHCVSS 7.8fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20840 [HIGH] CWE-122 CVE-2026-20840: Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.

cvelistv5nvd

CVE-2026-20826HIGHCVSS 7.0fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20826 [HIGH] CWE-362 CVE-2026-20826: Concurrent execution using shared resource with improper synchronization ('race condition') in Table 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.

cvelistv5nvd

CVE-2026-20875HIGHCVSS 7.5fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

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.

cvelistv5nvd

CVE-2026-20844HIGHCVSS 7.4fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20844 [HIGH] CWE-362 CVE-2026-20844: Use after free in Windows Clipboard Server allows an unauthorized attacker to elevate privileges loc Use after free in Windows Clipboard Server allows an unauthorized attacker to elevate privileges locally.

cvelistv5nvd

CVE-2026-20816HIGHCVSS 7.0fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20816 [HIGH] CWE-367 CVE-2026-20816: Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker to elevate privileges locally.

cvelistv5nvd

CVE-2026-20804HIGHCVSS 7.7fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20804 [HIGH] CWE-266 CVE-2026-20804: Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.

cvelistv5nvd

CVE-2026-20852HIGHCVSS 7.7fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20852 [HIGH] CWE-266 CVE-2026-20852: Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.

cvelistv5nvd

CVE-2026-20869HIGHCVSS 7.0fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20869 [HIGH] CWE-362 CVE-2026-20869: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session Manager (LSM) allows an authorized attacker to elevate privileges locally.

cvelistv5nvd

CVE-2026-20822HIGHCVSS 7.8fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20822 [HIGH] CWE-416 CVE-2026-20822: Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges l Use after free in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.

cvelistv5nvd

CVE-2026-20849HIGHCVSS 7.5fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20849 [HIGH] CWE-807 CVE-2026-20849: Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacke Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacker to elevate privileges over a network.

cvelistv5nvd

CVE-2026-20848HIGHCVSS 7.5fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20848 [HIGH] CWE-362 CVE-2026-20848: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

cvelistv5nvd

CVE-2026-20843HIGHCVSS 7.8fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20843 [HIGH] CWE-284 CVE-2026-20843: Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized att Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.

cvelistv5nvd

CVE-2026-20832HIGHCVSS 7.8fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

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

cvelistv5nvd

CVE-2026-20860HIGHCVSS 7.8fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20860 [HIGH] CWE-843 CVE-2026-20860: 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.

cvelistv5nvd

CVE-2026-20926HIGHCVSS 7.5fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20926 [HIGH] CWE-362 CVE-2026-20926: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

cvelistv5nvd

CVE-2026-20921HIGHCVSS 7.5fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20921 [HIGH] CWE-362 CVE-2026-20921: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows an authorized attacker to elevate privileges over a network.

cvelistv5nvd

CVE-2026-20940HIGHCVSS 7.8fixed in 10.0.14393.8783≥ 10.0.14393.0, < 10.0.14393.87832026-01-13

CVE-2026-20940 [HIGH] CWE-822 CVE-2026-20940: Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker t Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

cvelistv5nvd

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