What is CVE-2026-69555?

CVE-2026-69555 is a critical-severity vulnerability in Microsoft Azure Arc, classified under Incorrect Authorization. CVSS score: 10.0/10. Published 2026-08-20.

How severe is CVE-2026-69555?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Auth bypass in Microsoft Azure Arc

CVE-2026-69555

Incorrect authorization in Azure Arc allows an unauthorized attacker to elevate privileges over a network.

Vulnerability class: Broken Access Control

Published 2026-08-20 · last modified 2026-08-24.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.0th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.008 · change: +0.004

Affected products

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

Azure Arc Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-69555?: CVE-2026-69555 is a critical-severity vulnerability in Microsoft Azure Arc, classified under Incorrect Authorization. CVSS score: 10.0/10. Published 2026-08-20.
How severe is CVE-2026-69555?: Critical severity. CVSS v3 base score is 10.0 out of 10.