CVE-2021-32773

Name: CVE-2021-32773
Creator: NVD / NIST
Published: 2021-07-20T00:15:08.883+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.87%

Last modified Jun 17, 2026

CVE-2021-32773 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Racket is a general-purpose programming language and an ecosystem for language-oriented programming. In versions prior to 8.2, code evaluated using the Racket sandbox could cause system modules to incorrectly use attacker-created modules instead of their intended dependencies. EPSS estimates a 0.87% chance of exploitation in the next 30 days.

Description

Racket is a general-purpose programming language and an ecosystem for language-oriented programming. In versions prior to 8.2, code evaluated using the Racket sandbox could cause system modules to incorrectly use attacker-created modules instead of their intended dependencies. This could allow system functions to be controlled by the attacker, giving access to facilities intended to be restricted. This problem is fixed in Racket version 8.2. A workaround is available, depending on system settings. For systems that provide arbitrary Racket evaluation, external sandboxing such as containers limit the impact of the problem. For multi-user evaluation systems, such as the `handin-server` system, it is not possible to work around this problem and upgrading is required.

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

0.87%

54.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Racket-Lang	Racket	< 8.2

References

https://github.com/racket/racket/commit/6ca4ffeca1e5877d44f835760ad89f18488d97e1Patch, Third Party Advisory
https://github.com/racket/racket/security/advisories/GHSA-cgrw-p7p7-937cThird Party Advisory
https://github.com/racket/racket/commit/6ca4ffeca1e5877d44f835760ad89f18488d97e1Patch, Third Party Advisory
https://github.com/racket/racket/security/advisories/GHSA-cgrw-p7p7-937cThird Party Advisory

Timeline

Published: Jul 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32773?

How severe is CVE-2021-32773?

CVE-2021-32773 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.87% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32773?

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-2021-32773?

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

Scan your code now

Source: NVD / NIST