What is CVE-2026-69321?

CVE-2026-69321 is a medium-severity vulnerability in Microsoft Windows 10 1607, classified under Missing Authentication for Critical Function. CVSS score: 5.5/10. Published 2026-09-08.

How severe is CVE-2026-69321?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Auth bypass in Microsoft Windows 10 1607

CVE-2026-69321

Missing authentication for critical function in Windows Power Dependency Coordinator allows an authorized attacker to perform tampering locally.

Vulnerability class: Broken Authentication

Published 2026-09-08 · last modified 2026-09-24.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.8th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

Windows Power Dependency Coordinator Tampering Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-69321?: CVE-2026-69321 is a medium-severity vulnerability in Microsoft Windows 10 1607, classified under Missing Authentication for Critical Function. CVSS score: 5.5/10. Published 2026-09-08.
How severe is CVE-2026-69321?: Medium severity. CVSS v3 base score is 5.5 out of 10.