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-2026-70009

CVE-2026-70009CRITICAL

Microsoft Azure ARC — Azure Arc 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   .0053   43.1     —

AFFECTED
  Product    Versions  Fixed
  Azure ARC  - –       —

TIMELINE
  Aug 3   Reserved by microsoft
  Sep 17  Published (CNA: microsoft)
  Sep 25  RESCORED — CVE-2026-70009 (Microsoft Azure ARC). CVSS 9.3 → 9.8 (NVD).

CWE-22 · CNA: microsoft · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

Improper limitation of a pathname to a restricted directory ('path traversal') in Azure Arc allows an unauthorized attacker to elevate privileges over a network.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 3, 2026	Reserved	Reserved by microsoft
September 17, 2026	Published	Published (CNA: microsoft)
September 25, 2026	RESCORED	RESCORED — CVE-2026-70009 (Microsoft Azure ARC). CVSS 9.3 → 9.8 (NVD).

Affected

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

Weaknesses

CWE-22

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70009 [vendor-advisory, patch]

Authoritative record: CVE-2026-70009 at cve.org

Vendors: microsoft

Weaknesses: CWE-22

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-70009 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.