Resource exhaustion in Cisco Ultra-Reliable Wireless Backhaul
CVE-2026-20080
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.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.003 (23.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Cisco Ultra-reliable Wireless Backhaul — versions 1.0.0, 1.1.0, 1.0.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20080?
- CVE-2026-20080 is a medium-severity vulnerability in Cisco Ultra-Reliable Wireless Backhaul, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-01-21.
- How severe is CVE-2026-20080?
- Medium severity. CVSS v3 base score is 5.3 out of 10.