CVE-2021-43453

highpriority · track · 39EPSS 0.013 · 69 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.26% (69th) EPSS

CVSS 7.5 · high

Is it mine?

2 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

A Heap-based Buffer Overflow vulnerability exists in JerryScript 2.4.0 and prior versions via an out-of-bounds read in parser_parse_for_statement_start in the js-parser-statm.c file. This issue is similar to CVE-2020-29657.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USprimary

affected products (2)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
jerryscript jerryscript≤ 2.4.0nvdUScpe:2.3:a:jerryscript:jerryscript:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2022-04-07modified 2026-06-17

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+11869 more

references (4)

External citations — patches, advisories, analysis.

https://cxsecurity.com/cveshow/CVE-2021-43453/cnnvd
https://github.com/jerryscript-project/jerryscript/issues/4754 cnnvd
https://github.com/jerryscript-project/jerryscript/issues/4754 enisa_euvd
https://github.com/jerryscript-project/jerryscript/issues/4754ExploitIssue TrackingThird Party Advisorynvd

scry

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