Urgent Alert: New Vulnerabilities in Mozilla Firefox and Thunderbird

Bar Refael

March 20, 2024

Mozilla has released urgent security updates for Firefox (version 124) and Firefox ESR (version 115.9), as well as Thunderbird (version 115.9), to address a total of 14 vulnerabilities. These vulnerabilities has the potential for remote code execution, sandbox escapes, system crashes, data theft, and settings manipulation.

High-Risk Vulnerabilities:

  • CVE-2024-2605: Potential sandbox escapes for Windows systems.
  • CVE-2024-2606: Mishandling of internal code structures.
  • CVE-2024-2607: Code execution flaws specific to older ARM-based devices.
  • CVE-2024-2608: Integer overflows allowing malicious code writing outside intended areas.
  • CVE-2024-2614: Additional memory safety issues, some potentially leading to code execution.
  • CVE-2024-2615: Allows attackers to execute malicious code on the user’s computer without any interaction.


  • Update Immediately: Users should manually check for updates and apply them as soon as possible. In Firefox, navigate to the “Help” menu, then “About Firefox.” For Thunderbird, the process is similar.
  • Stay Vigilant: Adhere to online safety practices, such as being cautious with links and attachments in emails, downloading from trusted sources, and keeping antivirus software up-to-date.


Given the severity of these vulnerabilities, especially CVE-2024-2615, it is crucial for users and organizations to update their Mozilla products promptly to protect against potential exploits. Continuous monitoring and adherence to cybersecurity best practices remain key in safeguarding against emerging threats.

Stay Secure. Stay Informed.

OP Innovate Research Team.

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