CVE-2026-62772

HIGH CVSS 3.1: 7.8 EPSS 0.24%
Updated Aug 13, 2026
Microsoft
Parameter Value
CVSS 7.8 (HIGH)
Affected Versions before 10.0.28000.2704
Fixed In 10.0.28000.2704
Type CWE-122 (Heap-based Buffer Overflow)
Vendor Microsoft
Public PoC No

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

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 2

Configuration From (including) Up to (excluding)
Microsoft Windows_11_26h1
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
10.0.28000.2704
Microsoft Windows_11_26h1
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*
10.0.28000.2704