Undefined behavior in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Published: 2026-02-24
CVSS: 9.8
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Download Exploit for CVE-2026-2771 here:
Use Tor Browser to access .onion site.
https://sonitex.com/exploit-577-cve-2026-21536/
https://sonitex.com/exploit-524-cve-2026-28074/