CVE-2025-5272

HIGH EPSS 17.7%
Published May 27, 20251y ago · Modified Jun 17, 20261w ago
7.3 CVSS 3.1
High
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Published May 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
7.3
Exploitability
3.9
Impact
3.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability Low

Threat Intelligence

EPSS Exploit Probability
17.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 2

VendorProductVersionRange
mozillafirefox* <139.0
mozillathunderbird* <139.0

References 3

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/buglist.cgi?bug_id=1726254%2C1742738%2C1960121
    Broken Link
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-42/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-45/

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.