CVE-2021-46325: Espruino 2v10.246 was discovered to contain a stack buffer overflow via src/jsutils.c in vcbprintf.

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HIGH 7.8MITIGATE

CVE-2021-46325 is a high-severity flaw (CVSS 7.8) affecting espruino. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 45%)
CISA exploited list	No
Weakness	CWE-787
Published	2022-01-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: espruino

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-01-20 22:15 UTCPublished CVE record published
2026-06-17 04:14 UTCUpdated Record last modified

espruino espruino MITIGATE

Affected: 2.10.246

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.10.246

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-46325?

espruino: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-46325 being exploited?

CVE-2021-46325 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-46325 affect?

CVE-2021-46325 affects espruino. Severity is high (CVSS 7.8). Espruino 2v10.246 was discovered to contain a stack buffer overflow via src/jsutils.c in vcbprintf.

How urgent is CVE-2021-46325?

Priority 46/100. High severity; Public exploit reference

Related CVEs

CVE-2024-25201 HIGH 7.5 MITIGATE Espruino 2v20 (commit fcc9ba4) was discovered to contain an Out-of-bounds Read via jsvStringIteratorPrintfCall
CVE-2024-25200 HIGH 7.5 MITIGATE Espruino 2v20 (commit fcc9ba4) was discovered to contain a Stack Overflow via the jspeFactorFunctionCall at sr
CVE-2022-25465 HIGH 7.8 MITIGATE Espruino 2v11 release was discovered to contain a stack buffer overflow via src/jsvar.c in jsvGetNextSibling.
CVE-2022-25044 HIGH 7.8 MITIGATE Espruino 2v11.251 was discovered to contain a stack buffer overflow via src/jsvar.c in jsvNewFromString.
CVE-2021-46324 HIGH 7.8 MITIGATE Espruino 2v11.251 was discovered to contain a stack buffer overflow via src/jsvar.c in jsvNewFromString.

References

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