CVE-2026-58529: Windows Active Directory Federation Services (ADFS) Information Disclosure Vulnerability

highCVSS 7.1CVE-2026-58529

Out-of-bounds read in Active Directory Federation Services (AD FS) allows an authorized attacker to disclose information over a network.

CSIRTS triage

vendor: Microsoft product: Active Directory Federation Services Information disclosure

What: Out-of-bounds read in Active Directory Federation Services (AD FS) allows an authorized attacker to disclose information over a network.
Who is affected: Authorized users of Active Directory Federation Services are affected.
Urgency: Remediation is urgent due to the high severity and potential for information disclosure over the network.
Action: Apply the latest security update for Active Directory Federation Services.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.1
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58529

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.

Low exploitation riskCVE-2026-585290.95% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 58% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58529	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Windows Active Directory

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-54115: Integer overflow or wraparound in Windows Active Directory allows an authorized attacker to el…nvd · 2026-07-14
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highCVE-2026-49164: Windows Active Directory Domain Services Remote Code Execution Vulnerabilitymsrc · 2026-07-14
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