Memory Corruption Vulnerability in Firefox by Mozilla
CVE-2025-10533

8.8HIGH

Key Information:

Vendor

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

What is CVE-2025-10533?

This vulnerability in Firefox allows for potential memory corruption, which could lead to arbitrary code execution or system compromise. Affected versions include Firefox prior to version 143, as well as specific Extended Support Release (ESR) versions. It is crucial for users and organizations to ensure that they are running the latest versions of Firefox to mitigate any risks associated with this vulnerability.

Affected Version(s)

Firefox < 143

Firefox ESR < 115.28

Firefox ESR < 140.3

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1980788
https://www.mozilla.org/security/advisories/mfsa2025-73/
https://www.mozilla.org/security/advisories/mfsa2025-74/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Andrew Creskey
.