Buffer Overflow Vulnerability in Firefox Web Browser
CVE-2025-10532

6.5MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
16 September 2025

What is CVE-2025-10532?

A buffer overflow vulnerability has been identified that impacts Mozilla's Firefox browser and its Extended Support Release (ESR). This security issue affects versions prior to Firefox 143 and Firefox ESR 140.3. Exploitation of this vulnerability could lead to arbitrary code execution, thus putting users at risk. It is crucial for users to upgrade to the latest versions to mitigate potential threats and ensure optimal security while browsing the web.

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Affected Version(s)

Firefox < 143

Firefox ESR < 140.3

Thunderbird < 143

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1979502
https://www.mozilla.org/security/advisories/mfsa2025-73/
https://www.mozilla.org/security/advisories/mfsa2025-75/

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Gary Kwong
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