Description

Memory safety bugs present in Firefox 139 and Thunderbird 139. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 140 and Thunderbird < 140.

INFO

Published Date :

2025-06-24T12:28:04.830Z

Last Modified :

2026-02-26T17:50:26.573Z

Source :

mozilla
AFFECTED PRODUCTS

The following products are affected by CVE-2025-6436 vulnerability.

Vendors Products
Mozilla
  • Firefox
  • Thunderbird
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-6436.

URL Resource
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1941377%2C1960948%2C1966187%2C1966505%2C1970764 cve-icon
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1941377%2C1960948%2C1966187%2C1966505%2C1970764%2C1942930 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-6436 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-6436 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.
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