PT-2026-58390 · Microsoft · Active Directory Federation Services+1

CVE-2026-50411 · Published 2026-07-14 · Updated 2026-07-15

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

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

Description A stack-based buffer overflow exists in Active Directory Federation Services (AD FS), which allows an unauthenticated attacker to remotely trigger a denial of service (DoS) over a network. This issue occurs because the authentication process includes an unauthenticated mechanism to disable authentication, effectively allowing an offline mode to be triggered.

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

DoS

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2026-50411

Affected Products

Active Directory Federation Services

Windows

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-50411 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-50411 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-50411 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50411 · Vendor Advisory
• https://twitter.com/windowsforum/status/2077349747212366317 · Twitter Post