CVE-2025-14333
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-09

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description
Memory safety bugs present in Firefox ESR 140.5, Thunderbird ESR 140.5, Firefox 145 and Thunderbird 145. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
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Meta Information
Published
2025-12-09
Last Modified
2026-04-13
Generated
2026-06-16
AI Q&A
2025-12-09
EPSS Evaluated
2026-06-14
NVD
CVE-2025-14333
Affected Vendors & Products
Showing 6 associated CPEs
Vendor Product Version / Range
mozilla thunderbird_esr 140.5
mozilla thunderbird 145
mozilla firefox_esr 140.5
mozilla firefox 145
mozilla firefox to 146.0 (inc)
mozilla thunderbird to 146.0 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability involves memory safety bugs in certain versions of Firefox and Thunderbird (specifically Firefox ESR 140.5, Thunderbird ESR 140.5, Firefox 145, and Thunderbird 145). These bugs can cause memory corruption, which could potentially be exploited by attackers to execute arbitrary code on affected systems.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run arbitrary code on your system without your permission, potentially leading to unauthorized access, data theft, or system compromise.

Mitigation Strategies

To mitigate this vulnerability, update Firefox to version 146 or later, and Firefox ESR to version 140.6 or later. Similarly, update Thunderbird and Thunderbird ESR to their latest versions to ensure the memory safety bugs are fixed.

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