CVE-2020-27637

Name: CVE-2020-27637
Creator: NVD / NIST
Published: 2021-01-12T04:15:13+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.24%

Last modified Jun 17, 2026

CVE-2020-27637 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The R programming language’s default package manager CRAN is affected by a path traversal vulnerability that can lead to server compromise. This vulnerability affects packages installed via the R CMD install cli command or the install.packages() function from the interpreter. EPSS estimates a 2.24% chance of exploitation in the next 30 days.

Description

The R programming language’s default package manager CRAN is affected by a path traversal vulnerability that can lead to server compromise. This vulnerability affects packages installed via the R CMD install cli command or the install.packages() function from the interpreter. Update to version 4.0.3

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.24%

80.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
R-Project	Cran	< 4.0.3

References

https://labs.bishopfox.com/advisories/cran-version-4.0.2Exploit, Third Party Advisory
https://security.gentoo.org/glsa/202401-07
https://www.r-project.org/foundation/Vendor Advisory
https://labs.bishopfox.com/advisories/cran-version-4.0.2Exploit, Third Party Advisory
https://security.gentoo.org/glsa/202401-07
https://www.r-project.org/foundation/Vendor Advisory

Timeline

Published: Jan 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27637?

How severe is CVE-2020-27637?

CVE-2020-27637 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.24% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27637?

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-2020-27637?

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

Scan your code now

Source: NVD / NIST