CVE-2026-56155
Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability
Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. Deadline for federal agencies: 2026-07-28.
7 articles across 6 outlets · first covered Jul 14, 2026 · latest Jul 15, 2026
Coverage timeline
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Microsoft, SonicWall bugs found; RabbitMQ patches auth flawssecurityonline.info · Jul 15, 2026
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Microsoft patches 622 flaws, fixes three critical zero day bugswww.malwarebytes.com · Jul 15, 2026
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Microsoft patches 570 flaws, two zero days actively exploitedsecurityonline.info · Jul 15, 2026
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Records Are Made to Be Broken: Patch Tuesday Raises Triage Stakeswww.darkreading.com · Jul 14, 2026
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CISA warns ADFS flaw allows local privilege escalationcisa.gov · Jul 14, 2026
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Microsoft releases record 621 patches as Adobe updates key appswww.thezdi.com · Jul 14, 2026
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Microsoft Patches Record 622 Vulnerabilities, Including Two Exploited Zero-Dayswww.securityweek.com · Jul 14, 2026