CVE-2018-12242: Symantec Messaging Gateway

Critical severity, CVSS 9.8. EPSS: 3% chance of exploitation in the next 30 days.

The Symantec Messaging Gateway product prior to 10.6.6 may be susceptible to an authentication bypass exploit, which is a type of issue that can allow attackers to potentially circumvent security mechanisms currently in place and gain access to the system or network.

Affected products

• Symantec Messaging Gateway: before 10.6.6 (fixed in 10.6.6)

Published 2018-09-19. Last modified 2026-06-17.