CVE-2021-1274: Cisco Catalyst SD-WAN Manager

High severity, CVSS 8.6. EPSS: 1.9% chance of exploitation in the next 30 days.

Multiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute denial of service (DoS) attacks against an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Affected products

• Cisco Catalyst SD-WAN Manager: affected versions not specified
• Cisco IOS XE SD-WAN: affected versions not specified
• Cisco SD-WAN Firmware: version 18.3.5 only; version 18.3.8 only; version 18.4.1 only; version 18.4.4 only; version 18.4.5 only; version 19.2.0 only; …
• Cisco SD-WAN Vbond Orchestrator: affected versions not specified
• Cisco SD-WAN Vsmart Controller Firmware: any version

Published 2021-01-20. Last modified 2026-06-17.