CVE-2021-46556

Name: CVE-2021-46556
Creator: NVD / NIST
Published: 2022-01-27T21:15:11.317+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.62%

Last modified Jun 17, 2026

CVE-2021-46556 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Cesanta MJS v2.20.0 was discovered to contain a SEGV vulnerability via mjs_bcode_insert_offset at src/mjs_bcode.c. This vulnerability can lead to a Denial of Service (DoS).. EPSS estimates a 0.62% chance of exploitation in the next 30 days.

Description

Cesanta MJS v2.20.0 was discovered to contain a SEGV vulnerability via mjs_bcode_insert_offset at src/mjs_bcode.c. This vulnerability can lead to a Denial of Service (DoS).

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.62%

45.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cesanta	Mjs	2.20.0

References

https://github.com/cesanta/mjs/issues/227Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/cesanta/mjs/issues/227Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Jan 27, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-46556?

Cesanta MJS v2.20.0 was discovered to contain a SEGV vulnerability via mjs_bcode_insert_offset at src/mjs_bcode.c. This vulnerability can lead to a Denial of Service (DoS).

How severe is CVE-2021-46556?

CVE-2021-46556 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.62% probability of exploitation in the next 30 days.

How do I fix CVE-2021-46556?

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-2021-46556?

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

Scan your code now

Source: NVD / NIST