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Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

MicrosoftCVE-2026-62799

Microsoft Windows 11 version 26H1: heap buffer overflow

Microsoft

CVE-2026-62799 · Published Aug 11, 2026 · updated Aug 13, 2026

High7.8
Fix: upgrade to 10.0.28000.2704 or later
Microsoft advisory

Heap-based buffer overflow in Windows SMB Client allows an authorized attacker to elevate privileges locally.

Affected versions

PackageAffectedFixed in
Windows 11 version 26H1
Product
>= 10.0.28000.0, < 10.0.28000.270410.0.28000.2704
Details and references
CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-122

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