CVE-2025-1020
Critical · CVSS 9.8- CVSS
- 9.8
- nvd
- EPSS
- 0.54%
- 43th pct
- KEV
- No
- Class
- other
- CWE-787, CWE-787
Description
Memory safety bugs present in Firefox 134 and Thunderbird 134. 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 and Thunderbird 135.
References
Status: profiled · ingested 2026-10-05T18:00:53.000Z