What is CVE-2026-26117?

CVE-2026-26117 is a high-severity vulnerability in Microsoft Arc Enabled Servers - Azure Connected Machine Agent, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.8/10. Published 2026-03-10.

How severe is CVE-2026-26117?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Microsoft Arc Enabled Servers - Azure Connected Machine Agent

CVE-2026-26117

Authentication bypass using an alternate path or channel in Azure Windows Virtual Machine Agent allows an authorized attacker to elevate privileges locally.

EPSS: 0.000 (9.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.

Affected products

Microsoft Arc Enabled Servers - Azure Connected Machine Agent — versions 1.0.0

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

Arc Enabled Servers - Azure Connected Machine Agent Elevation of Privilege Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-26117?: CVE-2026-26117 is a high-severity vulnerability in Microsoft Arc Enabled Servers - Azure Connected Machine Agent, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.8/10. Published 2026-03-10.
How severe is CVE-2026-26117?: High severity. CVSS v3 base score is 7.8 out of 10.