CVE-2025-6426

HIGH
MEDIUM Priority: 0.02 BB Relevance: 68/100
Published: 2025-06-24 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

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

Description

The executable file warning did not warn users before opening files with the `terminal` extension. *This bug only affects Firefox for macOS. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
mozilla firefox < 128.12.0
mozilla firefox < 140.0

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

8.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.21%
Raw Score 0.002050
Percentile 10.5%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00205
2026-10-28
0.00205

Intelligence Sources

nvd ref →