Exploited vulnerability

CVE-2026-85880

TLP:CLEAR

Microsoft Windows Heap-Based Buffer Overflow Vulnerability

Microsoft Windows Advanced Local Procedure Call contains a heap-based buffer overflow vulnerability that allows an attacker to elevate privileges locally.

Facts

Vendor: Microsoft
Product: Windows
CVSS: 7.8
EPSS (probability of exploitation within 30 days): 0.4 %
On CISA's Known Exploited Vulnerabilities list since: 8 September 2026
First known exploitation: 8 September 2026
CISA's deadline for US federal agencies: 22 September 2026
Weakness: CWE-122
First seen by Risk Letters: 8 September 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD