Known vulnerabilities in Microsoft Windows Server 2012 R2 (Server Core installation)
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CVE list
| CVE | Summary | Score | Published |
|---|---|---|---|
| CVE-2026-20940 | Heap-based buffer overflow in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges… | 7.8 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-2026-20926 | 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-2026-20925 | 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-2026-20921 | 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-2026-20869 | Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Local Session… | 7.0 High | Jan 13, 2026 |
| CVE-2026-20875 | Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker… | 7.5 High | Jan 13, 2026 |
| CVE-2026-20860 | Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an… | 7.8 High | Jan 13, 2026 |
| CVE-2026-20856 | Improper input validation in Windows Server Update Service allows an unauthorized attacker to execute code over a… | 8.1 High | Jan 13, 2026 |
| CVE-2026-20847 | Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to perform… | 6.5 Medium | Jan 13, 2026 |
| CVE-2026-20840 | Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally | 7.8 High | Jan 13, 2026 |
| CVE-2026-20839 | Improper access control in Windows Client-Side Caching (CSC) Service allows an authorized attacker to disclose… | 5.5 Medium | Jan 13, 2026 |
| CVE-2026-20833 | Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose… | 5.5 Medium | Jan 13, 2026 |
| CVE-2026-20834 | Absolute path traversal in Windows Shell allows an unauthorized attacker to perform spoofing with a physical attack | 4.6 Medium | Jan 13, 2026 |
| CVE-2026-20831 | Time-of-check time-of-use (toctou) race condition in Windows Ancillary Function Driver for WinSock allows an… | 7.8 High | Jan 13, 2026 |
| CVE-2026-20828 | Out-of-bounds read in Windows Internet Connection Sharing (ICS) allows an unauthorized attacker to disclose… | 4.6 Medium | Jan 13, 2026 |
| CVE-2026-20824 | Protection mechanism failure in Windows Remote Assistance allows an unauthorized attacker to bypass a security feature… | 5.5 Medium | Jan 13, 2026 |
| CVE-2026-20821 | Exposure of sensitive information to an unauthorized actor in Windows Remote Procedure Call allows an unauthorized… | 6.2 Medium | Jan 13, 2026 |
| CVE-2026-20820 | Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate… | 7.8 High | Jan 13, 2026 |
| CVE-2026-20816 | Time-of-check time-of-use (toctou) race condition in Windows Installer allows an authorized attacker to elevate… | 7.8 High | Jan 13, 2026 |
| CVE-2026-20809 | Time-of-check time-of-use (toctou) race condition in Windows Kernel Memory allows an authorized attacker to elevate… | 7.8 High | Jan 13, 2026 |
| CVE-2026-20805 | Exploited Microsoft Windows Information Disclosure Vulnerability | 5.5 Medium | Jan 13, 2026 |
Other Microsoft products
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Windows 10 Version 22H2 4041
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Windows Server 2012 (Server Core installation) 3732