CVE-2021-4287

Name: CVE-2021-4287
Creator: NVD / NIST
Published: 2022-12-27T11:15:10.64+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.93%

Last modified Jun 17, 2026

CVE-2021-4287 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A vulnerability, which was classified as problematic, was found in ReFirm Labs binwalk up to 2.3.2. Affected is an unknown function of the file src/binwalk/modules/extractor.py of the component Archive Extraction Handler. EPSS estimates a 1.93% chance of exploitation in the next 30 days.

Description

A vulnerability, which was classified as problematic, was found in ReFirm Labs binwalk up to 2.3.2. Affected is an unknown function of the file src/binwalk/modules/extractor.py of the component Archive Extraction Handler. The manipulation leads to symlink following. It is possible to launch the attack remotely. Upgrading to version 2.3.3 is able to address this issue. The name of the patch is fa0c0bd59b8588814756942fe4cb5452e76c1dcd. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216876.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.93%

77.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Microsoft	Binwalk	< 2.3.3

References

https://github.com/ReFirmLabs/binwalk/commit/fa0c0bd59b8588814756942fe4cb5452e76c1dcdPatch, Third Party Advisory
https://github.com/ReFirmLabs/binwalk/pull/556Patch, Third Party Advisory
https://github.com/ReFirmLabs/binwalk/releases/tag/v2.3.3Release Notes, Third Party Advisory
https://vuldb.com/?ctiid.216876Third Party Advisory
https://vuldb.com/?id.216876Third Party Advisory
https://github.com/ReFirmLabs/binwalk/commit/fa0c0bd59b8588814756942fe4cb5452e76c1dcdPatch, Third Party Advisory
https://github.com/ReFirmLabs/binwalk/pull/556Patch, Third Party Advisory
https://github.com/ReFirmLabs/binwalk/releases/tag/v2.3.3Release Notes, Third Party Advisory
https://vuldb.com/?ctiid.216876Third Party Advisory
https://vuldb.com/?id.216876Third Party Advisory

Timeline

Published: Dec 27, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4287?

How severe is CVE-2021-4287?

CVE-2021-4287 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.93% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4287?

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-2021-4287?

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

Scan your code now

Source: NVD / NIST