CVE-2025-10536 — Sensitive Information Exposure in Mozilla Firefox

CWE-200 — Sensitive Information Exposure11 documents8 sources
Severity
6.2MEDIUMNVD
EPSS
0.0%
top 94.41%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedSep 16
Latest updateFeb 2

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 2.5 | Impact: 3.6

Affected Packages3 packages

▶NVDmozilla/firefox< 140.3.0+1
▶NVDmozilla/thunderbird141.0 — 143.0+1
▶Debianmozilla/thunderbird< 1:140.3.0esr-1~deb11u1+3

🔴Vulnerability Details

3
CVEList
Information disclosure in the Networking: Cache component↗2025-09-16
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OSV
CVE-2025-10536: Information disclosure in the Networking: Cache component↗2025-09-16
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GHSA
GHSA-74x5-q3v4-qjxx: This vulnerability affects Firefox < 143, Firefox ESR < 140↗2025-09-16
▶

📋Vendor Advisories

7
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
▶
Red Hat
firefox: thunderbird: Information disclosure in the Networking: Cache component↗2025-09-16
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Debian
CVE-2025-10536: firefox - Information disclosure in the Networking: Cache component. This vulnerability af...↗2025
▶
Mozilla
Mozilla Foundation Security Advisory 2025-77: CVE-2025-10536↗
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Mozilla
Mozilla Foundation Security Advisory 2025-75: CVE-2025-10536↗
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CVE-2025-10536 — Sensitive Information Exposure | cvebase