VDB
CVE-2026-20173
CVE-2026-20173
PUBLISHED
CVSS 5.8 MEDIUM
Reported by cisco · Published October 7, 2026
A vulnerability in Cisco NX-OS Software could allow an unauthenticated, remote attacker to exhaust system resources, causing a denial of service (DoS) condition. This vulnerability exists because rate limiting was improperly applied to some protocols. An attacker could exploit this vulnerability by sending a high rate of UDP or TCP connections to a data plane interface on an affected device. A successful exploit could allow the attacker to cause instability to various routing and control plane protocols through some packet loss and temporary disruptions, causing a DoS condition. This DoS condition will clear without manual intervention soon after the high rate of traffic is stopped.
Risk Scores
CVSS 3.1
5.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco NX-OS Software | 8.2(5), 7.3(5)D1(1), 8.4(2) |
| Cisco | Cisco NX-OS Software | 8.2(5), 7.3(5)D1(1), 8.4(2) |
Timeline
- Oct 7, 2026 Coalition ESS Score
- Oct 7, 2026 CVE Published
- Oct 7, 2026 CVE Updated