CVE-2026-62772
High
Description
Heap-based buffer overflow in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Microsoft Windows
PublishedAug 11, 2026
First seenAug 11, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- microsoft windows_11_26h110.0.28000.2704 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_11_26h1 | v < 10.0.28000.2704 | 10.0.28000.2704 |
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