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No exploitation reportedFix available

CVE-2020-27637

No exploitation reported by the sources we read.

  • Published2021-01-12
  • Fixed in4.0.3
  • WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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

Timeline

dates in UTC
  1. 2021-01-1204:15CVE publishedNVD

Versions per branch

NVD
R-project cran
BranchAffectedFixed in
4.0< 4.0.34.0.3

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • r-baseUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • r-baseUbuntu:Pro:14.04:LTSall versions · no fixed version listed
  • r-baseUbuntu:20.04:LTSall versions · no fixed version listed
  • r-baseUbuntu:18.04:LTSall versions · no fixed version listed
  • r-baseDebian:14all versions · fixed in 4.0.3-1
  • r-baseDebian:13all versions · fixed in 4.0.3-1
  • r-baseDebian:12all versions · fixed in 4.0.3-1

Vendor advisories

  • CVE-2020-27637 Red Hat Product Security

    R: code execution via malicious CRAN package

Full record on NVD

Fix

  1. Update R-project cran to 4.0.3

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-01-12
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-vw79-85j5-c56w

Frequently asked questions

What is CVE-2020-27637?

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

Is CVE-2020-27637 actively exploited?

Active exploitation of CVE-2020-27637 has not been confirmed. Its EPSS score was 2.3% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-27637?

CVE-2020-27637 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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