CVE-2025-1943

Memory safety bugs present in Firefox 135 and Thunderbird 135. 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 136 and Thunderbird 136.

• CWE-122

• https://bugzilla.mozilla.org/buglist.cgi?bug_id=1869650%2C1938451%2C1940326%2C1944052%2C1944063%2C1947281Broken Link
• https://www.mozilla.org/security/advisories/mfsa2025-14/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-17/Vendor Advisory

Published

Mar 4, 2025

Last Modified

Jun 17, 2026

Status

Modified

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