CVE-2025-29828

Windows Schannel Remote Code Execution Vulnerability

State: Published
Severity: 8.1 High
Published: Jun 10, 2025
Updated: Feb 26, 2026
Reserved: Mar 11, 2025

Description

Missing release of memory after effective lifetime in Windows Cryptographic Services allows an unauthorized attacker to execute code over a network.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

Product	Versions
Windows 11 version 22H2Microsoft	10.0.22621.0 to before 10.0.22621.5472Affected
Windows 11 version 22H3Microsoft	10.0.22631.0 to before 10.0.22631.5472Affected
Windows 11 Version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.5472Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.4349Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.3807Affected
Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft	10.0.25398.0 to before 10.0.25398.1665Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.4349Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.4349Affected

References

Windows Schannel Remote Code Execution Vulnerabilityvendor-advisorypatch

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