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Vulnerability record · CVE-2025-14861 · published 18 December 2025

CVE-2025-14861: Mozilla firefox memory buffer overflow vulnerability

Mozilla · Firefox

Memory safety bugs present in Firefox 146. 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 146.0.1.

8.8 CVSS 3.1 High EPSS 0.25% · top 84.8% CWE-119 · Memory buffer overflow
8.8CVSS 3.1 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Memory safety bugs present in Firefox 146. 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 146.0.1.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1996570%2C1999700 Broken Link
https://www.mozilla.org/security/advisories/mfsa2025-98/ Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2025-14861), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.