CVE-2018-20388: Comtrend Cm-6200un Firmware

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

Comtrend CM-6200un 123.447.007 and CM-6300n 123.553mp1.005 devices allow remote attackers to discover credentials via iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 SNMP requests.

Affected products

• Comtrend Cm-6200un Firmware: version 123.447.007 only
• Comtrend Cm-6300n Firmware: version 123.553mp1.005 only

Published 2018-12-23. Last modified 2026-06-17.