What is CVE-2025-14860?

CVE-2025-14860 is a critical-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 9.8/10. Published 2025-12-18.

How severe is CVE-2025-14860?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in Mozilla Firefox

CVE-2025-14860

Use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 146.0.1.

Vulnerability class: Use-After-Free

Published 2025-12-18 · last modified 2026-09-25.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (22.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Mozilla Firefox — versions 146.0.1

Weakness classification (CWE)

CWE-416 — Use After Free

References

bugzilla.mozilla.org/show_bug.cgi (Permissions Required)
www.mozilla.org/security/advisories/mfsa2025-98/ (Vendor Advisory)

Frequently asked questions

What is CVE-2025-14860?: CVE-2025-14860 is a critical-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 9.8/10. Published 2025-12-18.
How severe is CVE-2025-14860?: Critical severity. CVSS v3 base score is 9.8 out of 10.