Dashboard / CVE-2025-6424

CVE-2025-6424

CRITICAL
INFO Priority: 0.78 BB Relevance: 81/100
Published: 2025-06-24 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: High
A: High

Description

A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

Weakness Classification (1)

Affected Software (3)

VendorProductVersion
mozilla firefox < 115.25.0
mozilla firefox < 140.0
mozilla firefox 116.0 – 128.12.0

References & Advisories (8)

Bug Bounty Relevance

81 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

7.96%
Raw Score 0.079640
Percentile 94.7%
Date 2026-10-28

Intelligence Sources

nvd ref →

External Links