What is CVE-2026-122986?

CVE-2026-122986 is a high-severity vulnerability in Microsoft Kernel-Mshv-6.6.137.mshv2-2.azl3.x86 64, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2026-11-10.

How severe is CVE-2026-122986?

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

Privilege escalation in Microsoft Kernel-Mshv-6.6.137.mshv2-2.azl3.x86 64

CVE-2026-122986

Improper privilege management in Microsoft Azure Kubernetes Service allows an authorized attacker to elevate privileges locally.

Vulnerability class: Privilege Escalation

Published 2026-11-10 · last modified 2026-11-11.

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.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Microsoft Kernel-Mshv-6.6.137.mshv2-2.azl3.x86 64

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

Microsoft Azure Kubernetes Service Elevation of Privilege Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-122986?: CVE-2026-122986 is a high-severity vulnerability in Microsoft Kernel-Mshv-6.6.137.mshv2-2.azl3.x86 64, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2026-11-10.
How severe is CVE-2026-122986?: High severity. CVSS v3 base score is 7.8 out of 10.