Known vulnerabilities in Windows Server

Vendor: Microsoft
Software CPE: cpe:2.3:o:microsoft:windows_server:*:*:*:*:*:*:*:*
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
#VU137948 - Use After Free
CVE-2026-54127
CWE-416 Low
No
No
2012 R2 6.3.9600.23291, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137947 - Use After Free
CVE-2026-50694
CWE-416 High
No
No
2012 R2 6.3.9600.23291, 2012 6.2.9200.26226, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137946 - Missing Required Cryptographic Step
CVE-2026-55144
CWE-325 Low
No
No
2012 R2 6.3.9600.23291, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137944 - Heap-based Buffer Overflow
CVE-2026-54122
CWE-122 High
No
No
2012 R2 6.3.9600.23291, 2012 6.2.9200.26226, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137943 - Use After Free
CVE-2026-54995
CWE-416 High
No
No
2012 R2 6.3.9600.23291, 2012 6.2.9200.26226, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137942 - Loop with Unreachable Exit Condition ('Infinite Loop')
CVE-2026-54119
CWE-835 Medium
No
No
2012 R2 6.3.9600.23291, 2012 6.2.9200.26226, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137941 - Use After Free
CVE-2026-54114
CWE-416 Low
No
No
2012 R2 6.3.9600.23291, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137940 - Integer underflow
CVE-2026-54982
CWE-191 High
No
No
2012 R2 6.3.9600.23291, 2012 6.2.9200.26226, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137939 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2026-54112
CWE-362 Low
No
No
2012 R2 6.3.9600.23291, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137938 - Improper Certificate Validation
CVE-2026-55001
CWE-295 Low
No
No
2012 R2 6.3.9600.23291, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137937 - Heap-based Buffer Overflow
CVE-2026-54986
CWE-122 Low
No
No
2012 R2 6.3.9600.23291, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137936 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2026-54107
CWE-362 Low
No
No
2012 R2 6.3.9600.23291, 2012 6.2.9200.26226, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137935 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2026-54111
CWE-362 Low
No
No
2012 R2 6.3.9600.23291, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137934 - Heap-based Buffer Overflow
CVE-2026-54990
CWE-122 High
No
No
2012 R2 6.3.9600.23291, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137933 - Use After Free
CVE-2026-54989
CWE-416 Low
No
No
2012 R2 6.3.9600.23291, 2012 6.2.9200.26226, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137932 - Use After Free
CVE-2026-54129
CWE-416 Low
No
No
2012 R2 6.3.9600.23291, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137931 - Missing Authentication for Critical Function
CVE-2026-49174
CWE-306 Low
No
No
2012 R2 6.3.9600.23291, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137930 - Improper Access Control
CVE-2026-49170
CWE-284 Low
No
No
2012 R2 6.3.9600.23291, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137929 - Use After Free
CVE-2026-49169
CWE-416 Medium
No
No
2012 R2 6.3.9600.23291, 2025 10.0.26100.33158 17.07.2026 SB2026071705
#VU137928 - Heap-based Buffer Overflow
CVE-2026-49164
CWE-122 High
No
No
2012 R2 6.3.9600.23291, 2012 6.2.9200.26226, 2016 10.0.14393.9339, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158 17.07.2026 SB2026071705


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