Main Vulnerability Database Vulnerabilities #VU154757

Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2026-83523

Published: October 14, 2026

Vulnerability identifier: #VU154757

CSH Severity: High

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-83523

CWE-ID: CWE-122

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on a client system.

The vulnerability exists due to a heap-based buffer overflow in Windows Image Acquisition when processing a server's response. A remote attacker can host a malicious server and convince a user to connect to it from an affected client to execute arbitrary code on the client system.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-83523

Install security update from vendor's website.

Microsoft Windows - addressed in versions 11 24H2 10.0.26100.9711, 11 25H2 10.0.26200.9711, 11 26H1 10.0.28000.3231
Windows Server - update to 2025 10.0.26100.33650

External References

Related Security Bulletins