CVE-2025-10536 Information disclosure in the Networking: Cache component

What is CVE-2025-10536?

CVE-2025-10536 is a medium-severity vulnerability in Mozilla Firefox, published on 16 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Information disclosure in the Networking: Cache component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.

Weakness: CWE-200

Which versions are affected by CVE-2025-10536?

It affects 2 products.

Products include Mozilla Firefox, Mozilla Thunderbird.

How do I fix CVE-2025-10536?

Upgrade to a fixed version.

Is CVE-2025-10536 being exploited?

There is no known exploitation of CVE-2025-10536 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2025-10536, GHSA-74x5-q3v4-qjxx, UBUNTU-CVE-2025-10536.