PT-2025-1145 · Microsoft+1 · Windows Ntlm V1+2

Dylan Bickerstaff · Published 2025-01-14 · Updated 2025-10-11 · CVE-2025-21311

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Windows NTLM V1 (affected versions not specified)

Description The issue is related to an elevation-of-privilege vulnerability in the implementation of the NTLMv1 protocol in Windows operating systems. This vulnerability is associated with weaknesses in the authentication procedure. Exploitation of the vulnerability may allow a remote attacker to elevate their privileges.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

LPE

Weakness Enumeration

CWE-303

Related Identifiers

BDU:2025-00424

CVE-2025-21311

Affected Products

Debian

Windows

Windows Ntlm V1

References · 21

• https://security-tracker.debian.org/tracker/CVE-2025-21311 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21311 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-21311 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21311 · Security Note
• https://ubuntu.com/security/CVE-2025-21311 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-21311 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-21311 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/716912 · Security Note
• https://bdu.fstec.ru/vul/2025-00424 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-21311 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-21311 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21311 · Security Note
• https://vuldb.com/?id.291756 · Note
• https://twitter.com/fletch_ai/status/1879453615288652044 · Twitter Post
• https://twitter.com/transilienceai/status/1886933669836939450 · Twitter Post