Known vulnerabilities in Microsoft Windows Server 2025 (Server Core installation)
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CVE list
| CVE | Summary | Score | Published |
|---|---|---|---|
| CVE-2026-20870 | Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally | 7.8 High | Jan 13, 2026 |
| CVE-2026-20867 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management… | 7.8 High | Jan 13, 2026 |
| CVE-2026-20868 | Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to… | 8.8 High | Jan 13, 2026 |
| CVE-2026-20863 | Double free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally | 7.0 High | Jan 13, 2026 |
| CVE-2026-20866 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management… | 7.8 High | Jan 13, 2026 |
| CVE-2026-20862 | Exposure of sensitive information to an unauthorized actor in Windows Management Services allows an authorized… | 5.5 Medium | Jan 13, 2026 |
| CVE-2026-20861 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management… | 7.8 High | Jan 13, 2026 |
| CVE-2026-20854 | Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute… | 7.5 High | Jan 13, 2026 |
| CVE-2026-20849 | Reliance on untrusted inputs in a security decision in Windows Kerberos allows an authorized attacker to elevate… | 7.5 High | Jan 13, 2026 |
| CVE-2026-20848 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows… | 7.5 High | Jan 13, 2026 |
| CVE-2026-20843 | Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate… | 7.8 High | Jan 13, 2026 |
| CVE-2026-20830 | Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access… | 7.0 High | Jan 13, 2026 |
| CVE-2026-21221 | Concurrent execution using shared resource with improper synchronization ('race condition') in Capability Access… | 7.0 High | Jan 13, 2026 |
| CVE-2026-20934 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows… | 7.5 High | Jan 13, 2026 |
| CVE-2026-20932 | Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to… | 5.5 Medium | Jan 13, 2026 |
| CVE-2026-20926 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows… | 7.5 High | Jan 13, 2026 |
| CVE-2026-20927 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows… | 5.3 Medium | Jan 13, 2026 |
| CVE-2026-20924 | Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally | 7.8 High | Jan 13, 2026 |
| CVE-2026-20925 | External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network | 6.5 Medium | Jan 13, 2026 |
| CVE-2026-20922 | Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally | 7.8 High | Jan 13, 2026 |
| CVE-2026-20923 | Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally | 7.8 High | Jan 13, 2026 |
| CVE-2026-20921 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows… | 7.5 High | Jan 13, 2026 |
| CVE-2026-20919 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SMB Server allows… | 7.5 High | Jan 13, 2026 |
| CVE-2026-20918 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management… | 7.8 High | Jan 13, 2026 |
| CVE-2026-20876 | Heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to… | 6.7 Medium | Jan 13, 2026 |
Other Microsoft products
Windows Server 2019 5745
Windows Server 2019 (Server Core installation) 5648
Windows 10 Version 1809 5349
Windows Server 2022 5112
Windows Server 2016 5051
Windows Server 2016 (Server Core installation) 4847
Windows 10 Version 21H2 4539
Windows 10 Version 1607 4535
Windows Server 2012 R2 4103
Windows 10 Version 22H2 4041
Windows Server 2012 R2 (Server Core installation) 3958
Windows Server 2012 3865