Is CVE-2021-24037 actively exploited?

No active exploitation of CVE-2021-24037 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-24037 be exploited remotely?

Yes. CVE-2021-24037 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-24037?

CVE-2021-24037 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-24037

CRITICAL

CVE-2021-24037

CWE-416Published: June 15, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A use after free in hermes, while emitting certain error messages, prior to commit d86e185e485b6330216dee8e854455c694e3a36e allows attackers to potentially execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

NVD Source

Technical Analysis

CVE-2021-24037 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.