CVE-2021-21806

8.8 highEPSS 2.8%

High (8.8) in webkitgtk webkitgtk. EPSS 2.8% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

8.8 high

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

EPSS: 2.8% chance of exploitation in the next 30 days; higher than 86% of CVEs (scores of 2026-10-31)
CWE: CWE-416
Published: 2021-07-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

webkitgtk:webkitgtk

References

http://www.openwall.com/lists/oss-security/2021/07/23/1
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1214
http://www.openwall.com/lists/oss-security/2021/07/23/1
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1214

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