Security Alert (A26-02-25): Vulnerability in Firefox


 

Published on: 20 February 2026

Description:

Mozilla has published the advisories (MFSA2026-10 and MFSA2026-11) to address a vulnerability in Firefox. A remote attacker could entice a user to open a web page with specially crafted content on a vulnerable browser to exploit the vulnerabilities.

 

Affected Systems:

  • Firefox ESR Windows versions prior to version 115.32.1, 140.7.1
  • Firefox Windows versions prior to version 147.0.4

 

Impact:

Successful exploitation of the vulnerability could lead to remote code execution or denial of service on an affected system.

 

Recommendation:

Mozilla has released new versions of the product to address the issues and they can be downloaded at the following URLs:
Firefox 147.0.4 (Windows)
https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
Firefox ESR 115.32.1, 140.7.1 (Windows)
https://www.mozilla.org/en-US/firefox/all/#product-desktop-esr

Users of affected systems should follow the recommendations provided by the vendor and take immediate actions to mitigate the risk.

 

More Information:

  • https://www.mozilla.org/en-US/security/advisories/mfsa2026-10/
  • https://www.mozilla.org/en-US/security/advisories/mfsa2026-11/
  • https://www.hkcert.org/security-bulletin/mozilla-products-multiple-vulnerabilities_20260220
  • https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-2447


Tag: Firefox , Mozilla
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