CVE-2025-1017CRITICAL 9.8EPSS p40.8%
CVE-2025-1017CVE-2025-1017
Description
Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, 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 128.7, Thunderbird 128.7, and Thunderbird 135.
Scoring
| CVSS 3.1 | 9.8 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 0.53% probability of exploitation · percentile 40.8% · 2026-06-18T12:00:27Z |
| Published | 2025-02-04 |
| Last modified | 2026-04-13 |
Underlying weaknesses· 1
References
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1926256%2C1935984%2C1935471
- https://www.mozilla.org/security/advisories/mfsa2025-07/
- https://www.mozilla.org/security/advisories/mfsa2025-09/
- https://www.mozilla.org/security/advisories/mfsa2025-10/
- https://www.mozilla.org/security/advisories/mfsa2025-11/
- https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Out-of-bounds Writecwe-787 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.