CVE-2020-7666

Name: CVE-2020-7666
Creator: NVD / NIST
Published: 2020-09-01T14:15:14.253+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.53%

Last modified Jun 17, 2026

CVE-2020-7666 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. This affects all versions of package github.com/u-root/u-root/pkg/cpio. It is vulnerable to leading, non-leading relative path traversal attacks and symlink based (relative and absolute) path traversal attacks in cpio file extraction.. EPSS estimates a 1.53% chance of exploitation in the next 30 days.

Description

This affects all versions of package github.com/u-root/u-root/pkg/cpio. It is vulnerable to leading, non-leading relative path traversal attacks and symlink based (relative and absolute) path traversal attacks in cpio file extraction.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.53%

71.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
U-Root	U-Root	All versions

References

https://github.com/u-root/u-root/pull/1817Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMUROOTUROOTPKGCPIO-570440Exploit, Third Party Advisory
https://github.com/u-root/u-root/pull/1817Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMUROOTUROOTPKGCPIO-570440Exploit, Third Party Advisory

Timeline

Published: Sep 1, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-7666?

How severe is CVE-2020-7666?

CVE-2020-7666 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.53% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7666?

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-2020-7666?

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

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Source: NVD / NIST