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9.5CRITICAL

Multiple Vulnerabilities in Mozilla Products Could Allow for Arbitrary Code Execution

📅 7 April 2026 at 20:32 UTC📰 CIS AdvisoriesView original source ↗

Multiple vulnerabilities have been discovered in Mozilla products, the most severe of which could allow for arbitrary code execution. Mozilla Firefox is a web browser used to access the Internet.Mozilla Firefox ESR is a version of the web browser intended to be deployed in large organizations.Mozilla Thunderbird is an email client.Mozilla Thunderbird ESR is a version of the email client intended to be deployed in large organizations. Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution. Depending on the privileges associated with the user an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

Multiple vulnerabilities in Mozilla products, including Firefox and Thunderbird, could allow for arbitrary code execution, potentially leading to unauthorized access and data manipulation.

⚙️Technical Details
Affected Systems
Mozilla FirefoxMozilla Firefox ESRMozilla ThunderbirdMozilla Thunderbird ESR
Attack Vectors
arbitrary code execution
💥Impact Assessment
Severity: c
Who Is at Risk
users of Mozilla Firefox and Thunderbird
🛡️Recommended Actions
1Keep all software up to date with the latest security patches
2Use a reputable antivirus program to detect and remove malware
3Disable macros in Office documents from unknown sources
📦Affected Products
Mozilla FirefoxMozilla Thunderbird

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