Description

If a user saved a response from the Network tab in Devtools using the Save As context menu option, that file may not have been saved with the `.download` file extension. This could have led to the user inadvertently running a malicious executable. This vulnerability was fixed in Firefox 140 and Thunderbird 140.

INFO

Published Date :

2025-06-24T12:28:04.603Z

Last Modified :

2026-04-13T14:31:13.241Z

Source :

mozilla
AFFECTED PRODUCTS

The following products are affected by CVE-2025-6435 vulnerability.

Vendors Products
Mozilla
  • Firefox
  • Thunderbird
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-6435.

URL Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1950056 cve-icon cve-icon cve-icon
https://bugzilla.mozilla.org/show_bug.cgi?id=1961777 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-6435 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-6435 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-51/ cve-icon cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-54/ 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