Memory Corruption Vulnerability in Firefox by Mozilla
CVE-2025-10536

8.4HIGH

Key Information:

Vendor

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

What is CVE-2025-10536?

A memory corruption vulnerability exists in Firefox versions prior to 143 and Firefox ESR versions prior to 140.3. This flaw can potentially allow an attacker to execute arbitrary code, leading to severe security implications for users. It underscores the importance of regular updates and patches to maintain browser integrity and performance.

Affected Version(s)

Firefox < 143

Firefox ESR < 140.3

Thunderbird < 143

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1981502
https://www.mozilla.org/security/advisories/mfsa2025-73/
https://www.mozilla.org/security/advisories/mfsa2025-75/

CVSS V3.1

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ibuki Sato
.
CVE-2025-10536 : Memory Corruption Vulnerability in Firefox by Mozilla