CVE-2021-21806

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

An exploitable use-after-free vulnerability exists in WebKitGTK browser version 2.30.3 x64. A specially crafted HTML web page can cause a use-after-free condition, resulting in remote code execution. The victim needs to visit a malicious web site to trigger the vulnerability.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

No affected versions have been published.

Timeline

Published
Jul 8, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-21806: High severity, CVSS 8.8 | Vulnix