CVE-2026-62775 — MEDIUM (5.5)

Q: What is CVE-2026-62775?

CVE-2026-62775 is a vulnerability with a CVSS score of 5.5 (MEDIUM). Incorrect authorization in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to disclose information locally.

Q: How severe is CVE-2026-62775?

CVE-2026-62775 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-62775?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 11 26H1.

Vulnerability Description

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

CVSS Score

5.5

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Microsoft	Windows 11 26H1	< 10.0.28000.2704

Related Weaknesses (CWE)

CWE-863

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62775PatchVendor Advisory

FAQ

What is CVE-2026-62775?

CVE-2026-62775 is a vulnerability with a CVSS score of 5.5 (MEDIUM). Incorrect authorization in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to disclose information locally.

How severe is CVE-2026-62775?

CVE-2026-62775 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-62775?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 11 26H1.