HIGH 7.8 NVD ACTIVELY EXPLOITED

CVE-2026-85880

Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.

Affected Products

microsoft/windows_10_1607
microsoft/windows_10_1809
microsoft/windows_10_21h2
microsoft/windows_10_22h2
microsoft/windows_server_2012
microsoft/windows_server_2016
microsoft/windows_server_2019
microsoft/windows_server_2022

References

Published: 2026-09-08 · Source: NVD · Feed updated: 2026-09-11

This high severity vulnerability with a CVSS score of 7.8 was published on 2026-09-08 via NVD. ⚠ This vulnerability is in the CISA Known Exploited Vulnerabilities (KEV) catalog — it is being actively exploited in the wild. Affected: microsoft/windows_10_1607, microsoft/windows_10_1809, microsoft/windows_10_21h2 and 5 more.

Risk Timeline

CVE Disclosed2026-09-08 · 2 days ago

CISA KEV — Actively ExploitedU.S. federal agencies required to patch · confirmed threat-actor activity

Remediation Resources

Official Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85880

CISA / KEV

www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-202

Related Vulnerabilities

CVE	Title	Severity	CVSS
CVE-2026-83711	Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability	CRITICAL	10.0
CVE-2026-63508	Microsoft Planetary Computer Pro Elevation of Privilege Vulnerability	CRITICAL	10.0
CVE-2026-65667	Microsoft Teams Elevation of Privilege Vulnerability	CRITICAL	10.0
CVE-2026-65801	Microsoft Exchange Online Elevation of Privilege Vulnerability	CRITICAL	10.0
CVE-2026-69836	Microsoft Entra ID Remote Code Execution Vulnerability	CRITICAL	10.0
CVE-2026-56191	Microsoft Exchange Online Tampering Vulnerability	CRITICAL	10.0

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