Windows Server 2019 vulnerabilities

460 known vulnerabilities in Windows Server 2019 from Microsoft. 436 are rated high or critical, and 159 have been exploited in real attacks. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 8.1 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-61352Aug 11, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-59122Aug 11, 2026Microsoft

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

• 8.8 High severity

  Windows 10 Version 1607: Improper Neutralization of Special Elements used in a Command

  CVE-2026-49179Aug 11, 2026Microsoft

  Improper neutralization of special elements used in a command ('command injection') in Windows Active Directory allows an unauthorized attacker to execute code over a network.

• 7.8 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-58628Jul 14, 2026Microsoft

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

• 7.5 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-58531Jul 14, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB allows an authorized attacker to elevate privileges over a network.

• 8.1 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-56649Jul 14, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Network File System allows an unauthorized attacker to execute code over a network.

• 8.1 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-56188Jul 14, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Server Network driver allows an unauthorized attacker to execute code over a network.

• 7.8 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-54125Jul 14, 2026Microsoft

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

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50669Jul 14, 2026Microsoft

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

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50667Jul 14, 2026Microsoft

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

• 7.5 High severity

  Microsoft .NET Framework 3.5 AND 4.7.2: Loop with Unreachable Exit Condition

  CVE-2026-50647Jul 14, 2026MicrosoftEPSS 1.17%

  Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.

• 7.8 High severity

  Windows 10 Version 1809: Improper Link Resolution Before File Access

  CVE-2026-50469Jul 14, 2026Microsoft

  Improper link resolution before file access ('link following') in Windows Projected File System allows an authorized attacker to elevate privileges locally.

• 8.1 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50460Jul 14, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an unauthorized attacker to elevate privileges over a network.

• 8.1 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50452Jul 14, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an unauthorized attacker to elevate privileges over a network.

• 7.8 High severity

  Windows 10 Version 1607: Missing Authentication for Critical Functionality

  CVE-2026-50451Jul 14, 2026Microsoft

  Missing authentication for critical function in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50450Jul 14, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Wireless Wide Area Network Service allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Windows 10 Version 1607: Access of Resource Using Incompatible Type

  CVE-2026-50421Jul 14, 2026Microsoft

  Access of resource using incompatible type ('type confusion') in Windows Connected User Experiences and Telemetry allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50378Jul 14, 2026Microsoft

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

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50371Jul 14, 2026Microsoft

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

• 8.1 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50348Jul 14, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an unauthorized attacker to elevate privileges over a network.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50321Jul 14, 2026Microsoft

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

• 7.8 High severity

  Windows 10 Version 1809: Improper Neutralization of Special Elements used in a Command

  CVE-2026-58635Jul 14, 2026Microsoft

  Improper neutralization of special elements used in a command ('command injection') in Windows Narrator Braille allows an authorized attacker to elevate privileges locally.

• 7.5 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-58608Jul 14, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Print Spooler Components allows an authorized attacker to execute code over a network.

• 7.8 High severity

  Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Exploited

  CVE-2026-56155Jul 14, 2026Microsoft

  Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.

• 8.8 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-54999Jul 14, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an unauthorized attacker to execute code over an adjacent network.

• 8.8 High severity

  Windows 10 Version 1607: Integer Underflow (Wrap or Wraparound)

  CVE-2026-54982Jul 14, 2026Microsoft

  Integer underflow (wrap or wraparound) in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.

• 7.0 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-54112Jul 14, 2026Microsoft

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

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-54107Jul 14, 2026Microsoft

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

• 7.8 High severity

  Windows 10 Version 1607: Exposure of Sensitive Information to an Unauthorized Actor

  CVE-2026-50697Jul 14, 2026Microsoft

  Exposure of sensitive information to an unauthorized actor in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50384Jul 14, 2026Microsoft

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

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-50356Jul 14, 2026Microsoft

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

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-49803Jul 14, 2026Microsoft

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

• 7.8 High severity

  Windows 10 Version 1607: Improper Link Resolution Before File Access

  CVE-2026-49791Jul 14, 2026Microsoft

  Improper link resolution before file access ('link following') in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.

• 7.8 High severity

  Windows 10 Version 1607: Heap-based Buffer Overflow

  CVE-2026-49790Jul 14, 2026Microsoft

  Integer underflow (wrap or wraparound) in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to elevate privileges locally.

• 7.0 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-49784Jul 14, 2026Microsoft

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

• 7.0 High severity

  Windows 10 Version 1809: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-49183Jul 14, 2026Microsoft

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

• 8.1 High severity

  Windows 10 Version 1607: Concurrent Execution using Shared Resource with Improper Synchronization

  CVE-2026-42900Jul 14, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows App Store allows an unauthorized attacker to elevate privileges over a network.

• 7.5 High severity

  Windows 10 Version 1607: Memory Allocation with Excessive Size Value

  CVE-2026-40378Jul 14, 2026MicrosoftEPSS 1.17%

  Memory allocation with excessive size value in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.

• 8.1 High severity

  Windows 10 Version 1607: Use After Free

  CVE-2026-45635Jun 9, 2026Microsoft

  Access of resource using incompatible type ('type confusion') in Universal Plug and Play (upnp.dll) allows an unauthorized attacker to execute code over a network.

• 7.0 High severity

  Windows 10 Version 1607: Use After Free

  CVE-2026-45603Jun 9, 2026Microsoft

  Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.