Vulnerability details
CVE-2025-5272
Memory safety bugs fixed in Firefox 139 and Thunderbird 139
CVSS 3.1
7.3High
Official description
Memory safety bugs present in Firefox 138 and Thunderbird 138. 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 139 and Thunderbird 139.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.3High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| No product information recorded. | |||
References and advisories
3
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Details
- Published
- 2025-05-27
- Last updated
- 2026-04-13
- State
- Published
- Assigner (CNA)
- mozilla
Exploit prediction (EPSS)
0.34%
Probability of exploitation in 30 days
27.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-787Out-of-bounds Write