CVE-2025-21399: high-severity vulnerability in Microsoft Edge Update Setup
Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.4epss 0.7%
Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Microsoft Edge Update SetupRelated CVEs — Microsoft Edge Update Setup
In the same product, most dangerous first.
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21399https://www.vicarius.io/vsociety/posts/elevation-of-privilege-vulnerability-in-microsoft-edge-chromium-based-detection-scripthttps://www.vicarius.io/vsociety/posts/elevation-of-privilege-vulnerability-in-microsoft-edge-chromium-based-mitigation-script