Summary
generated automatically from NVD dataCVE-2026-85880 is a heap-based buffer overflow (CWE-122) in the Windows ALPC component that lets a locally authorized attacker elevate privileges. It affects several Windows 10 releases (1607, 1809, 21H2, 22H2) and Windows Server 2012, 2016, 2019 and 2022. It carries a CVSS v3.1 score of 7.8 (HIGH) and is listed in the CISA KEV catalog, which indicates active exploitation.
NVD description
Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.
⚠️ Actively exploited — CISA KEV
This CVE was added to CISA's Known Exploited Vulnerabilities catalog on 2026-09-08. It is confirmed exploited in the wild and must be patched as a priority.
Remediation deadline (US federal agencies): 2026-09-22
EPSS · FIRST.org
3.6%probability of exploitation in the next 30 days
Higher than 89% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-16, recomputed daily by FIRST.org.
In-depth analysis on cveo.tech
We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.
CVSS v3.1 Score
Information
- Published
- 8 sept. 2026
- Updated
- 24 sept. 2026
- Status
- Analyzed
- Source
- secure@microsoft.com
Affected products
Weaknesses (CWE)
References (2)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85880PatchVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-85880US Government Resource
Similar CVEs
Other vulnerabilities of type CWE-122
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