PT-2026-58245 · Microsoft · Active Directory

Published 2026-07-14 · Updated 2026-07-14 · CVE-2026-55001

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.

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

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

CVE-2026-55001

Affected Products

Active Directory

References · 3

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55001 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-55001 · Security Note
• https://twitter.com/windowsforum/status/2077147661023506499 · Twitter Post