PT-2026-7353 · Microsoft · Windows Ntlm+1

Dez_With + 2 · Published 2026-02-10 · Updated 2026-02-12 · CVE-2026-21249

Positive Technologies (AI Summary)

CVSS v3.1

3.3

Low

Base vector

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

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

Description A flaw exists in Windows NTLM that permits external control of file names or paths, potentially enabling a local attacker to perform spoofing. This issue allows attackers to affect the system.

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

Weakness Enumeration

CWE-73

Related Identifiers

BDU:2026-01808

CVE-2026-21249

ZDI-26-083

Affected Products

Windows

Windows Ntlm

References · 7

• https://osv.dev/vulnerability/CVE-2026-21249 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-21249 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-21249 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-21249 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-01808 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21249 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-26-083 · Security Note