CVE-2023-21720

Name: CVE-2023-21720
Creator: NVD / NIST
Published: 2023-02-14T20:15:14.59+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.22%

Last modified Jun 17, 2026

CVE-2023-21720 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Microsoft Edge (Chromium-based) Tampering Vulnerability. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

Microsoft Edge (Chromium-based) Tampering Vulnerability

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

1.22%

64.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-126

Affected Software

Vendor	Product	Versions
Microsoft	Edge Chromium	< 109.0.15.18.78

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21720Patch, Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21720Patch, Vendor Advisory
https://security.gentoo.org/glsa/202309-17Third Party Advisory

Timeline

Published: Feb 14, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-21720?

Microsoft Edge (Chromium-based) Tampering Vulnerability

How severe is CVE-2023-21720?

CVE-2023-21720 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.

How do I fix CVE-2023-21720?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-21720?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST