CVE-2026-85939
Windows Kernel Security Feature Bypass Vulnerability
MEDIUM
5.3
CVSS Score
Published: October 13, 2026 at 07:00 PM UTC
Updated: October 31, 2026 at 06:05 PM UTC
14 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows 10 1809
Using Windows 10 Version 1607 by Microsoft?
Get instant alerts when new vulnerabilities affect Windows 10 Version 1607 - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit
Description
Weak authentication in Windows Kernel allows an authorized attacker to bypass a security feature over a network.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 10.0.14393.961210.0.14393.0
v < 10.0.17763.937610.0.17763.0
v < 10.0.19044.780710.0.19044.0
v < 10.0.19045.780710.0.19045.0
v < 10.0.22631.765210.0.22631.0
v < 10.0.26100.971110.0.26100.0
v < 10.0.26200.971110.0.26200.0
v < 10.0.28000.323110.0.28000.0
v < 10.0.26300.9711
v < 10.0.14393.961210.0.14393.0
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85939SSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
5.3MEDIUMmicrosoft
Vector?
Quick Info
StatusANALYZED
CWE
CWE-1390
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card