CVE-2020-3198: Cisco IOS

Critical severity, CVSS 9.8. EPSS: 4.5% chance of exploitation in the next 30 days.

Multiple vulnerabilities in Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an unauthenticated, remote attacker or an authenticated, local attacker to execute arbitrary code on an affected system or cause an affected system to crash and reload. For more information about these vulnerabilities, see the Details section of this advisory.

Affected products

• Cisco IOS: version 12.2(60)ez16 only; version 15.0(2)sg11a only; version 15.3(3)jaa1 only; version 15.3(3)jpj only; version 15.4(1)cg only; version 15.4(2)cg only; …

Published 2020-06-03. Last modified 2026-06-17.