CVE-2025-1016

Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6. 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 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

• CWE-787
• CWE-787

• https://bugzilla.mozilla.org/buglist.cgi?bug_id=1936601%2C1936844%2C1937694%2C1938469%2C1939583%2C1940994Broken Link
• https://www.mozilla.org/security/advisories/mfsa2025-07/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-08/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-09/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-10/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2025-11/Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html

Published

Feb 4, 2025

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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