CVE-2025-59257
published 2025-10-14CVE-2025-59257: Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.
PriorityP338medium6.5CVSS 3.1
AVNACLPRLUINSUCNINAH
EPSS
1.37%
68.2th percentile
Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_11_24h2 | < 10.0.26100.6899 | 10.0.26100.6899 |
| microsoft | windows_11_25h2 | < 10.0.26200.6899 | 10.0.26200.6899 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.6899 | 10.0.26100.6899 |
| microsoft | windows_11_version_25h2 | >= 10.0.26200.0 < 10.0.26200.6899 | 10.0.26200.6899 |
| microsoft | windows_server_2022_23h2 | < 10.0.25398.1913 | 10.0.25398.1913 |
| microsoft | windows_server_2025 | <= 10.0.26100.6899 | — |
| microsoft | windows_server_2025 | >= 10.0.26100.0 < 10.0.26100.6899 | 10.0.26100.6899 |
| msrc | windows_11_version_24h2_for_arm64-based_systems | — | — |
| msrc | windows_11_version_24h2_for_x64-based_systems | — | — |
| msrc | windows_11_version_25h2_for_arm64-based_systems | — | — |
| msrc | windows_11_version_25h2_for_x64-based_systems | — | — |
| msrc | windows_server_2022_23h2_edition | — | — |
| msrc | windows_server_2025 | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
vendor_msrc6.5MEDIUM
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Microsoft
Windows Local Session Manager (LSM) Denial of Service Vulnerability
vendor_msrc·2025-10-14·CVSS 6.5
CVE-2025-59257 [MEDIUM] CWE-1287 Windows Local Session Manager (LSM) Denial of Service Vulnerability
Windows Local Session Manager (LSM) Denial of Service Vulnerability
Description: Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.
Windows Local Session Manager (LSM): Windows Local Session Manager (LSM)
Microsoft: Microsoft
Customer Action Required: Yes
Impact: Denial of Service
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5066835
Reference: https://support.microsoft.com/help/5066835
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5066780
Reference: https://support.microsoft.com/help/5066780
GHSA
GHSA-37x9-hxcw-w9fv: Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network
ghsa_unreviewed·2025-10-14
CVE-2025-59257 [MEDIUM] CWE-1287 GHSA-37x9-hxcw-w9fv: Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network
Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.
No detection rules found.
No public exploits indexed.
2025-10-14
Published