CVE-2026-20080: Cisco Ultra-Reliable Wireless Backhaul

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability in the SSH service of Cisco IEC6400 Wireless Backhaul Edge Compute Software could allow an unauthenticated, remote attacker to cause the SSH service to stop responding. This vulnerability exists because the SSH service lacks effective flood protection. An attacker could exploit this vulnerability by initiating a denial of service (DoS) attack against the SSH port. A successful exploit could allow the attacker to cause the SSH service to be unresponsive during the period of the DoS attack. All other operations remain stable during the attack.

Affected products

• Cisco Cisco Ultra-Reliable Wireless Backhaul: version 1.0.0 only; version 1.1.0 only; version 1.0.2 only; version 1.0.1 only

Published 2026-01-21. Last modified 2026-06-17.