CVE-2016-1947: Mozilla Firefox 43.x mishandles attempts to connect to the Application Reputation service, which makes it e...

Security readout for executives and security teams

CVE-2016-1947 affects Mozilla Firefox 43.x. When Firefox could not connect to its Application Reputation service, it could mishandle the missing reputation data, making unintended downloads easier for a remote attacker to trigger. The source bundle does not show code execution or active exploitation. Exposure is likely limited to endpoints running Firefox 43.x, including managed desktops, VDI images, kiosks, or distro-packaged Firefox covered by vendor advisories. Modern supported Firefox versions are less likely exposed, but this should be verified through asset inventory. Prioritize remediation where legacy Firefox 43.x remains in production or shared desktop environments. Business urgency is moderate: the issue weakens download safety controls, but the provided sources do not show active exploitation or direct system compromise. Mitigation focus: Inventory Firefox versions and identify any Firefox 43.x installations.; Apply Mozilla or operating-system vendor Firefox security updates.; Retire unsupported browser builds from gold images and kiosk systems..

Prepared

Jun 13, 2026, 21:06 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.