Known vulnerabilities in Windows Server - page 43

Vendor: Microsoft
Software: Windows Server
Software CPE: cpe:2.3:o:microsoft:windows_server:*:*:*:*:*:*:*:*
Website: https://www.microsoft.com
Total vulnerabilities: 6300
Public exploits: 488
Known exploited (KEV): 268
Highest CVSSv4 Score: 9.4

Breakdown by Severity Chart

Severity distribution of vulnerabilities affecting Windows Server Windows Server is affected by 6300 known vulnerabilities: 95 critical, 1270 high, 1244 medium, 3689 low Critical High Medium Low

Vulnerabilities (6300)

Vulnerability CWE-ID CSH Severity Public Exploit KEV First fixed release Published Bulletins
#VU121248 - Heap-based Buffer Overflow
CVE-2026-20876		 CWE-122 Low
No
No
 2022 23H2 10.0.25398.2092, 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011380
#VU121246 - Permissions, Privileges, and Access Controls
CVE-2026-20817		 CWE-264 Low
Available
No
 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011377
#VU121245 - Time-of-check Time-of-use (TOCTOU) Race Condition
CVE-2026-20816		 CWE-367 Low
No
No
 2008 R2 6.1.7601.28117, 2008 6.0.6003.23717, 2012 R2 6.3.9600.22968, 2012 6.2.9200.25868, 2016 10.0.14393.8783, 2019 10.0.17763.8276, 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011376
#VU121244 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2026-21221		 CWE-362 Low
No
No
 2025 10.0.26100.7623 13.01.2026 SB2026011375
#VU121243 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2026-20830		 CWE-362 Low
No
No
 2025 10.0.26100.7623 13.01.2026 SB2026011375
#VU121242 - Out-of-bounds read
CVE-2026-20851		 CWE-125 Low
No
No
 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011375
#VU121241 - Out-of-bounds read
CVE-2026-20835		 CWE-125 Low
No
No
 2022 23H2 10.0.25398.2092, 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011375
#VU121240 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2026-20815		 CWE-362 Low
No
No
 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011375
#VU121239 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2026-20836		 CWE-362 Low
No
No
 2016 10.0.14393.8783, 2019 10.0.17763.8276, 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011374
#VU121238 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2026-20814		 CWE-362 Low
No
No
 2016 10.0.14393.8783, 2019 10.0.17763.8276, 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011374
#VU121237 - Double Free
CVE-2026-20863		 CWE-415 Low
No
No
 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011373
#VU121236 - Use After Free
CVE-2026-20920		 CWE-416 Low
No
No
 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623 13.01.2026 SB2026011373
#VU121235 - Type confusion
CVE-2026-20811		 CWE-843 Low
No
No
 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011373
#VU121234 - Type confusion
CVE-2026-20860		 CWE-843 Low
No
No
 2008 R2 6.1.7601.28117, 2008 6.0.6003.23717, 2012 R2 6.3.9600.22968, 2012 6.2.9200.25868, 2016 10.0.14393.8783, 2019 10.0.17763.8276, 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011372
#VU121233 - Time-of-check Time-of-use (TOCTOU) Race Condition
CVE-2026-20831		 CWE-367 Low
No
No
 2008 R2 6.1.7601.28117, 2008 6.0.6003.23717, 2012 R2 6.3.9600.22968, 2012 6.2.9200.25868, 2016 10.0.14393.8783, 2019 10.0.17763.8276, 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623, 2025 10.0.26100.32230 13.01.2026 SB2026011372
#VU121232 - Free of Memory not on the Heap
CVE-2026-20810		 CWE-590 Low
No
No
 2019 10.0.17763.8276, 2025 10.0.26100.7623 13.01.2026 SB2026011372
#VU121231 - Improper Access Control
CVE-2026-20929		 CWE-284 Medium
No
No
 2008 R2 6.1.7601.28117, 2008 6.0.6003.23717, 2012 R2 6.3.9600.22968, 2012 6.2.9200.25868, 2016 10.0.14393.8783, 2019 10.0.17763.8276, 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623 13.01.2026 SB2026011371
#VU121230 - Exposure of sensitive information to an unauthorized actor
CVE-2026-20805		 CWE-200 High
No
Exploited
 2008 R2 6.1.7601.28117, 2012 R2 6.3.9600.22968, 2012 6.2.9200.25868, 2016 10.0.14393.8783, 2019 10.0.17763.8276, 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.7623 13.01.2026 SB2026011370
#VU121229 - Improper Access Control
CVE-2026-0386		 CWE-284 Medium
No
No
 2008 R2 6.1.7601.28117, 2008 6.0.6003.23717, 2012 R2 6.3.9600.22968, 2012 6.2.9200.25868, 2016 10.0.14393.8783, 2019 10.0.17763.8276, 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.32230 13.01.2026 SB2026011369
#VU121228 - Use of Uninitialized Resource
CVE-2026-20962		 CWE-908 Low
No
No
 2019 10.0.17763.8276, 2022 23H2 10.0.25398.2092, 2022 10.0.20348.4648, 2025 10.0.26100.32230 13.01.2026 SB2026011368


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