CVE-2026-85939

MEDIUM
Published Oct 13, 2026 Modified Oct 16, 2026 CWE-1390

Description

Weak authentication in Windows Kernel allows an authorized attacker to bypass a security feature over a network.

Is your site exposed to CVE-2026-85939?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.3
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS — Exploit Prediction

0.0038
Probability of exploitation
0.30%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-1390 CWE-1390

References

Frequently Asked Questions

What is CVE-2026-85939? +
Weak authentication in Windows Kernel allows an authorized attacker to bypass a security feature over a network. It has a CVSS v3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2026-85939? +
CVE-2026-85939 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0038, placing it in the 0th percentile for exploitation probability.
How do I check if I'm vulnerable to CVE-2026-85939? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-29994

This vulnerability exists in the CAP back office application due to improper authentication check at the API endpoint. An unauthenticated …
CVE-2025-11084

A security issue exists within DataMosaix™ Private Cloud, allowing attackers to bypass MFA during setup and obtain a valid login-token …
CVE-2026-0274

An improper validation of credentials vulnerability in the CommvaultSecurityIQ integration for Cortex XSOAR and Cortex XSIAM allows an unauthenticated attacker …
CVE-2026-44476

Doorkeeper is an OAuth 2 provider for Ruby on Rails. In version 1.9.0, an attacker who knows only a dynamically …
CVE-2026-10714

A security issue exists within FactoryTalk® Services Platform (FTSP), allowing an attacker to bypass JWT signature validation during Okta Web …
CVE-2025-39596 9.8

Weak Authentication vulnerability in Quentn.com GmbH Quentn WP quentn-wp allows Privilege Escalation.This issue affects Quentn WP: from n/a through <= …

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2026-85939 — free, no signup required.