CVE-2024-21399: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

Severity: high (CVSS 8.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-02-02 · updated 2026-08-10
Weakness: CWE-416

Description

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

Affected products

Microsoft Edge (Chromium): before 121.0.2277.98 — fixed in 121.0.2277.98
Microsoft Edge (Chromium): from 1.0.0 before 121.0.2277.98 — fixed in 121.0.2277.98

How to fix

Upgrade to a fixed version: Microsoft Edge (Chromium) 121.0.2277.98; Microsoft Edge (Chromium) 121.0.2277.98. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21399
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21399

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