CVE-2023-21805 Windows MSHTML Platform Remote Code Execution Vulnerability

High 7.8 Published Updated

Attackers can execute arbitrary code via the Windows MSHTML platform, requiring immediate patching for all affected Windows versions.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Local or same network only
Victim action needed
A user has to click or open something
Fix
None listed

What is CVE-2023-21805?

CVE-2023-21805 is a high-severity code injection vulnerability in Microsoft Windows 10, published on 14 Feb 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Windows MSHTML Platform Remote Code Execution Vulnerability

Weakness: CWE-77

Which versions are affected by CVE-2023-21805?

It affects 13 products.

Products include Microsoft Windows 10, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 20h2, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2 and 7 more.

How do I fix CVE-2023-21805?

No fix has been published for CVE-2023-21805 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2023-21805 being exploited?

There is no known exploitation of CVE-2023-21805 in the wild and no public exploit code.

All Microsoft Windows 10 vulnerabilities

Sources

Also known as GHSA-grqq-prph-hfgm.

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