Important Security Warning: Call to update Firefox on Android to patch a dangerous vulnerability

The General Directorate for Information Systems Security has issued a new security warning for users of Android smartphones regarding a software vulnerability that poses a risk to the personal data of users who rely on the Mozilla Firefox browser.

Details of the vulnerability and targeted versions

In a recent alert bulletin, the Directorate explained that this vulnerability, classified as «important», specifically affects all versions of Firefox for Android older than version 153.0.3. This vulnerability has been assigned the international security identifier CVE-2026-18809, reflecting the urgent need for users to address it.

Risks of exploiting the software bug

Regarding the potential consequences, the relevant authorities warned that a successful cyberattack exploiting this vulnerability could grant hackers unauthorized access to confidential data and information stored on the affected devices. This puts user privacy and the security of their personal and bank accounts at stake if outdated versions continue to be used.

Immediate prevention and protection measures

In light of these digital risks, the General Directorate for Information Systems Security stressed the necessity of promptly updating the Firefox browser and installing the latest security upgrades released by the Mozilla Foundation. It emphasized that performing an immediate update via the authorized app store remains the primary and only option to patch this flaw and prevent any attempts at unauthorized access or data leaks.