Cyber Resilience

CVE-2025-59257

Medium

Published: 14 October 2025

Published
14 October 2025
Modified
20 October 2025
KEV Added
—
Patch
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CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0025 48.6th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-59257 is a medium-severity Improper Validation of Specified Type of Input (CWE-1287) vulnerability in Microsoft Windows 11 24H2. Its CVSS base score is 6.5 (Medium).

Operationally, ranked at the 48.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.

CWE(s)
CWE-1287

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

microsoft
windows 11 24h2
≤ 10.0.26100.6899
microsoft
windows 11 25h2
≤ 10.0.26200.6899
microsoft
windows server 2022 23h2
≤ 10.0.25398.1913
microsoft
windows server 2025
≤ 10.0.26100.6899

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References