CVE-2016-5295: Mozilla Firefox

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

This vulnerability allows an attacker to use the Mozilla Maintenance Service to escalate privilege by having the Maintenance Service invoke the Mozilla Updater to run malicious local files. This vulnerability requires local system access and is a variant of MFSA2013-44. Note: this issue only affects Windows operating systems. This vulnerability affects Firefox < 50.

Affected products

• Mozilla Firefox: before 50.0 (fixed in 50.0)

Published 2018-06-11. Last modified 2026-06-17.