What’s Vulnerable › Vulnerabilities

CVE-2023-38146: Windows Themes Remote Code Execution Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 37.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-12 · updated 2026-06-17
• Weakness: CWE-367

Description

Windows Themes Remote Code Execution Vulnerability

Affected products

• Microsoft Windows 11 21H2: before 10.0.22000.2416 — fixed in 10.0.22000.2416
• Microsoft Windows 11: before 10.0.22621.2275 — fixed in 10.0.22621.2275
• Microsoft Windows 11 21H2: from 10.0.0 before 10.0.22000.2416 — fixed in 10.0.22000.2416
• Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.2283 — fixed in 10.0.22621.2283

How to fix

Upgrade to a fixed version: Microsoft Windows 11 21H2 10.0.22000.2416; Microsoft Windows 11 10.0.22621.2275; Microsoft Windows 11 21H2 10.0.22000.2416; Microsoft Windows 11 10.0.22621.2283. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38146
• http://packetstormsecurity.com/files/176391/Themebleed-Windows-11-Themes-Arbitrary-Code-Execution.html
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38146

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