What is CVE-2026-2026?

CVE-2026-2026 is a medium-severity vulnerability in Microsoft Windows, classified under Incorrect Default Permissions. CVSS score: 6.1/10. Published 2026-02-13.

How severe is CVE-2026-2026?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Microsoft Windows

CVE-2026-2026

A vulnerability has been identified where weak file permissions in the Nessus Agent directory on Windows hosts could allow unauthorized access, potentially permitting Denial of Service (DoS) attacks.

Published 2026-02-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (1.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

www.tenable.com/security/tns-2026-05 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-2026?: CVE-2026-2026 is a medium-severity vulnerability in Microsoft Windows, classified under Incorrect Default Permissions. CVSS score: 6.1/10. Published 2026-02-13.
How severe is CVE-2026-2026?: Medium severity. CVSS v3 base score is 6.1 out of 10.