CVE tracker / CVE-2025-27729
CVE-2025-27729
CVE-2025-27729 is the Windows Shell Remote Code Execution Vulnerability. Microsoft rates it Important, CVSS 7.8. It is not in CISA's Known Exploited Vulnerabilities catalog. Published April 8, 2025.
Risk summary
HighRemote Code Execution
7.8
CVSS v3 base
0.8%
EPSS: chance of exploitation in 30 days
High
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV
Microsoft describes it: “Use after free in Windows Shell allows an unauthorized attacker to execute code locally.”
How to fix it
Microsoft lists 14 affected products and the update that fixes each:
- KB5055518 · fixed build 10.0.19045.5737, 10.0.19044.5737
Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 21H2 for ARM64-based Systems, and 1 more - KB5055523 · fixed build 10.0.26100.3775
Windows Server 2025, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows Server 2025 (Server Core installation) - KB5055528 · fixed build 10.0.22631.5189, 10.0.22621.5189
Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 22H2 for x64-based Systems, Windows 11 Version 22H2 for ARM64-based Systems
What Microsoft changed
- April 8, 2025: Information published.
- April 17, 2025: Updated acknowledgment. This is an informational change only.
Details
- Weakness
- CWE-416: Use After Free
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- April 8, 2025
- Last revised
- April 17, 2025
Get told when this changes
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References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.