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9.8CRITICAL

Multiple Vulnerabilities in Mozilla Products Could Allow for Arbitrary Code Execution

📅 1 July 2026 at 18:48 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.Thunderbird is a free, open-source email, calendar, and chat application.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 have been discovered in Mozilla products, allowing for arbitrary code execution, with the most severe vulnerability having a CVSS score of 9.8 and affecting Firefox versions prior to 152.0.4.

⚙️Technical Details
CVEs
CVE-2026-57962CVE-2026-57963CVE-2026-14241
Affected Systems
Firefox versions prior to 152.0.4Thunderbird versions prior to 152.0.1Thunderbird versions prior to 140.12.1
Attack Vectors
NETWORK
💥Impact Assessment
Severity: Unknown
🛡️Recommended Actions
1Apply appropriate updates provided by Mozilla to vulnerable systems immediately after appropriate testing.
2Perform application updates on enterprise assets through automated patch management on a monthly, or more frequent, basis.
3Use technical controls, such as application allowlisting, to ensure that only authorized software can execute or be accessed.
📦Affected Products
Mozilla FirefoxThunderbird
🔐NVD Verified DataVERIFIED
CVE-2026-57962CVSS 5.3MEDIUM
Attack Vector
NETWORK
Complexity
HIGH
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Weaknesses
CWE-400
CVE-2026-57963CVSS 6.5MEDIUM
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-79
CVE-2026-14241CVSS 9.8CRITICAL
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-787
Affected Products (CPE)
Mozilla Firefox

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