Description

A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog. *This bug only affects Thunderbird for Android. Other versions of Thunderbird are unaffected.*. This vulnerability was fixed in Firefox 138 and Thunderbird 138.

INFO

Published Date :

2025-04-29T13:13:40.899Z

Last Modified :

2026-04-13T14:28:45.158Z

Source :

mozilla
AFFECTED PRODUCTS

The following products are affected by CVE-2025-4086 vulnerability.

Vendors Products
Mozilla
  • Firefox
  • Thunderbird
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-4086.

URL Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1945705 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-4086 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-4086 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-28/ cve-icon cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-31/ cve-icon cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact