vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-62775

Windows Container Isolation FS Filter Driver (unionfs.sys) Information Disclosure Vulnerability

MEDIUM
5.5
CVSS Score
Published: August 11, 2026 at 05:06 PM UTC
Updated: October 28, 2026 at 08:07 PM UTC
1 product affected across 1 vendorWindows 11 26H1

Using Windows 11 version 26H1 by Microsoft?

Get instant alerts when new vulnerabilities affect Windows 11 version 26H1 - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

Incorrect authorization in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to disclose information locally.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Windows 11 26H1· Microsoft
95%
v < 10.0.28000.270410.0.28000.0
Affected range stops below 10.0.28000.2704, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No 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-2026-62775

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-863

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.

Create accountSign in
Free plan, no card