CVE-2021-3962

Name: CVE-2021-3962
Creator: NVD / NIST
Published: 2021-11-19T17:15:08.733+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 5.84%

Last modified Jun 17, 2026

CVE-2021-3962 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A flaw was found in ImageMagick where it did not properly sanitize certain input before using it to invoke convert processes. This flaw allows an attacker to create a specially crafted image that leads to a use-after-free vulnerability when processed by ImageMagick. EPSS estimates a 5.84% chance of exploitation in the next 30 days.

Description

A flaw was found in ImageMagick where it did not properly sanitize certain input before using it to invoke convert processes. This flaw allows an attacker to create a specially crafted image that leads to a use-after-free vulnerability when processed by ImageMagick. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

5.84%

92.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Imagemagick	Imagemagick	7.1.0-14

References

https://bugzilla.redhat.com/show_bug.cgi?id=2023196Issue Tracking, Patch, Third Party Advisory
https://github.com/ImageMagick/ImageMagick/commit/82775af03bbb10a0a1d0e15c0156c75673b4525ePatch, Third Party Advisory
https://github.com/ImageMagick/ImageMagick/issues/4446Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2023196Issue Tracking, Patch, Third Party Advisory
https://github.com/ImageMagick/ImageMagick/commit/82775af03bbb10a0a1d0e15c0156c75673b4525ePatch, Third Party Advisory
https://github.com/ImageMagick/ImageMagick/issues/4446Third Party Advisory

Timeline

Published: Nov 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3962?

How severe is CVE-2021-3962?

CVE-2021-3962 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 5.84% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3962?

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-2021-3962?

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

Scan your code now

Source: NVD / NIST