CVE-2021-46179

Name: CVE-2021-46179
Creator: NVD / NIST
Published: 2023-08-22T19:16:21.883+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.45%

Last modified Jun 17, 2026

CVE-2021-46179 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.45%

36.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Upx	Upx	< 4.0.0

References

https://github.com/upx/upx/issues/545Issue Tracking, Patch
https://github.com/upx/upx/issues/545Issue Tracking, Patch

Timeline

Published: Aug 22, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-46179?

Reachable Assertion vulnerability in upx before 4.0.0 allows attackers to cause a denial of service via crafted file passed to the the readx function.

How severe is CVE-2021-46179?

CVE-2021-46179 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.

How do I fix CVE-2021-46179?

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-2021-46179?

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

Scan your code now

Source: NVD / NIST