Security Alert (A26-10-21): Multiple Vulnerabilities in FireFox

Description:

Mozilla has published the advisories (MFSA2026-106, MFSA2026-107 and MFSA2026-108) to address multiple vulnerabilities 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 115.43, 153.5
• Firefox Windows versions prior to version 158

Impact:

Successful exploitation of the vulnerabilities could lead to denial of service, elevation of privilege, information disclosure, security restriction bypass or spoofing 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 158 (Windows)
https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
Firefox ESR 115.43, 153.5 (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/mfsa2026-106/
• https://www.mozilla.org/en-US/security/advisories/mfsa2026-107/
• https://www.mozilla.org/en-US/security/advisories/mfsa2026-108/
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-109704 (to CVE-2026-109757)
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-109759 (to CVE-2026-109783)