What is CVE-2021-46325?

CVE-2021-46325 is a high-severity vulnerability in Espruino, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-01-20.

How severe is CVE-2021-46325?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Espruino

CVE-2021-46325

Espruino 2v10.246 was discovered to contain a stack buffer overflow via src/jsutils.c in vcbprintf.

Vulnerability class: Buffer Overflow

Published 2022-01-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (53.4th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Espruino — versions 2.10.246

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/espruino/Espruino/issues/2114 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-46325?: CVE-2021-46325 is a high-severity vulnerability in Espruino, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-01-20.
How severe is CVE-2021-46325?: High severity. CVSS v3 base score is 7.8 out of 10.