CVE-2019-3635: McAfee Web Gateway

Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days.

Exfiltration of Data in McAfee Web Gateway (MWG) 7.8.2.x prior to 7.8.2.12 allows attackers to obtain sensitive data via crafting a complex webpage that will trigger the Web Gateway to block the user accessing an iframe.

Affected products

• McAfee Web Gateway: from 7.8.2.0, before 7.8.2.12 (fixed in 7.8.2.12)

Published 2019-08-14. Last modified 2026-06-17.