What is CVE-2026-70009?

CVE-2026-70009 is a critical-severity vulnerability in Microsoft Azure Arc, classified under Path Traversal. CVSS score: 9.3/10. Published 2026-09-17.

How severe is CVE-2026-70009?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Path Traversal in Microsoft Azure Arc

CVE-2026-70009

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

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N.

Affected products

Microsoft Azure Arc

Weakness classification (CWE)

CWE-22 — Path Traversal

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-70009?: CVE-2026-70009 is a critical-severity vulnerability in Microsoft Azure Arc, classified under Path Traversal. CVSS score: 9.3/10. Published 2026-09-17.
How severe is CVE-2026-70009?: Critical severity. CVSS v3 base score is 9.3 out of 10.