CVE-2026-85880
Microsoft Windows Heap-Based Buffer Overflow Vulnerability
Heap-based buffer overflow in Windows ALPC 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: 2026-09-22.
5 articles across 5 outlets · first covered Sep 8, 2026 · latest Sep 8, 2026
Coverage timeline
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Microsoft’s Record 972-Flaw Patch Haul Includes Two Zero-Daysarstechnica.com · Sep 8, 2026
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CISA Flags Actively Exploited Windows Flaw Enabling Privilege Escalationcisa.gov · Sep 8, 2026
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Adobe and Microsoft Patch 997 Flaws as Exploited Threats Mountwww.thezdi.com · Sep 8, 2026
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Microsoft Patches Two Windows Zero Days Exploited in Attackssecurityonline.info · Sep 8, 2026
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Microsoft Fixes 974 Flaws in Record Patch Tuesday Updatewww.securityweek.com · Sep 8, 2026