CVE-2026-70346

Stack-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.

Scoring

Severity

HIGH

CVSS base score

7.8

CVSS vector

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

EPSS probability

0.31%

CWE

CWE-121

Published

2026-08-11

Last modified

2026-09-09

Affected products

• Microsoft Windows 10 Version 1607
• Microsoft Windows 10 Version 1809
• Microsoft Windows 10 Version 21H2
• Microsoft Windows 10 Version 22H2
• Microsoft Windows 11 version 23H2
• Microsoft Windows 11 Version 23H2
• Microsoft Windows 11 Version 24H2
• Microsoft Windows 11 Version 25H2

Weakness type

• CWE-121

Related vulnerabilities

• CVE-2026-85384 — Authenticated Stack-Based Buffer Overflow in RE210 AC750 Configuration Import
• CVE-2026-83990 — Microsoft Graphics Component Elevation of Privilege Vulnerability
• CVE-2026-81953 — Microsoft Excel Remote Code Execution Vulnerability
• CVE-2026-81388 — Microsoft Excel Remote Code Execution Vulnerability
• CVE-2026-81396 — Microsoft Excel Remote Code Execution Vulnerability
• CVE-2026-73006 — DirectWrite Remote Code Execution Vulnerability
• CVE-2026-69614 — Microsoft Office Access Remote Code Execution Vulnerability
• CVE-2026-69510 — Windows DHCP Server Remote Code Execution Vulnerability

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