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CVE-2026-62772

Last refreshed2026-10-23

Status: UPDATED  |  Advisory ID: CVE-2026-62772

Key Details

CVECVE-2026-62772
CVSS Score / Version
7.8 (High) / CVSS v3.1
Updated2026-10-23
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Microsoft Windows 11 (version 26H1)
Classified as
CWE-122 (Heap-based Buffer Overflow)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MicrosoftWindows 11 (version 26H1)
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

Heap-based buffer overflow in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

What to Do

Monitor Microsoft's web page for any future patch releases. See vendor advisory link below.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-62772
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-62772
Vendor advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62772

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