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CVE-2026-50684: Active Directory Federation Server Spoofing Vulnerability

mediumCVSS 4.8CVE-2026-50684
Improper neutralization of input during web page generation ('cross-site scripting') in Active Directory Federation Services (AD FS) allows an authorized attacker to perform spoofing over a network.

CSIRTS triage

vendor: Microsoftproduct: Active Directory Federation ServicesCross-site scripting
What
Improper neutralization of input during web page generation in Active Directory Federation Services allows an authorized attacker to perform spoofing over a network.
Who is affected
Authorized users of Active Directory Federation Services are affected.
Urgency
Remediation is important due to the medium severity and potential for spoofing attacks.
Action
Apply the latest security patch for Active Directory Federation Services.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 4.8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50684

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-50684coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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