Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-85889

CVE-2026-85889CRITICAL

Microsoft Azure AI Foundry — Azure AI Foundry Elevation of Privilege Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0067   50.2     —

AFFECTED
  Product           Versions  Fixed
  Azure AI Foundry  - –       —

TIMELINE
  Sep 4   Reserved by microsoft
  Sep 17  Published (CNA: microsoft)
  Sep 25  RESCORED — CVE-2026-85889 (Microsoft Azure AI Foundry). CVSS 10 → 9.8 (NVD).

CWE-306 · CNA: microsoft · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

Missing authentication for critical function in Azure AI Foundry allows an unauthorized attacker to elevate privileges over a network.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 4, 2026	Reserved	Reserved by microsoft
September 17, 2026	Published	Published (CNA: microsoft)
September 25, 2026	RESCORED	RESCORED — CVE-2026-85889 (Microsoft Azure AI Foundry). CVSS 10 → 9.8 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Azure AI Foundry	—	-	—

Weaknesses

CWE-306

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85889 [vendor-advisory, patch]

Authoritative record: CVE-2026-85889 at cve.org

Vendors: microsoft

Weaknesses: CWE-306

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-85889 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.