PT-2026-58259 · Microsoft · Active Directory Federation Services

Published 2026-07-14 · Updated 2026-07-15 · CVE-2026-56155

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 Microsoft Active Directory Federation Services (affected versions not specified)

Description Insufficient granularity of access control allows an authorized attacker to elevate privileges locally. This issue involves the Distributed Key Management (DKM) Access Control Lists (ACLs), which require manual configuration by administrators to be fully secured.

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

LPE

Weakness Enumeration

CWE-1220

Related Identifiers

CVE-2026-56155

Affected Products

Active Directory Federation Services

References · 18

• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-56155 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-56155 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56155 · Vendor Advisory
• https://twitter.com/SecAlertsCo/status/2077184007264252040 · Twitter Post
• https://twitter.com/windowsforum/status/2077180880028590480 · Twitter Post
• https://twitter.com/SecurityAr58409/status/2077197307074802039 · Twitter Post
• https://cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56155 · Note
• https://twitter.com/horizon_secured/status/2077104523693244440 · Twitter Post
• https://twitter.com/Action1corp/status/2077117058215711098 · Twitter Post
• https://twitter.com/ThreatWire_/status/2077090404701257882 · Twitter Post
• https://twitter.com/notCVE/status/2077140964892676554 · Twitter Post
• https://twitter.com/DFIR_Lab/status/2077110190562811957 · Twitter Post
• https://twitter.com/The_Cyber_News/status/2077090185356214592 · Twitter Post
• https://t.me/EchelonEyes/4759 · Telegram Post
• https://i.redd.it/as3cb1d0i8dh1.png · Reddit Post