VULNERABILITY INTELLIGENCE

CVE-2021-21806

CVSS score8.8 HIGH

EPSS probability2.83%

CISA KEVNot currently listed

Published2021-07-08

Last modified2026-06-17

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

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.

Weakness classification

nvd@nist.gov: CWE-416

Primary references

talos-cna@cisco.com — Mailing List, Third Party Advisory
talos-cna@cisco.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory