Is CVE-2021-26194 actively exploited?

No active exploitation of CVE-2021-26194 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-26194 be exploited remotely?

Yes. CVE-2021-26194 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-26194?

CVE-2021-26194 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2021-26194

CWE-416Published: June 10, 2021· Updated: Jun 17, 2026

6.5

CVSS v3.1

Official Description

An issue was discovered in JerryScript 2.4.0. There is a heap-use-after-free in ecma_is_lexical_environment in the ecma-helpers.c file.

NVD Source

Technical Analysis

CVE-2021-26194 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

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