CVE-2026-20177
Cisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerability
Description
A vulnerability in the handling of management plane packets by Cisco Industrial Ethernet (IE) 1000 Series Switches could allow an unauthenticated, remote attacker to cause the device manager, SSH, or API to become inaccessible.This vulnerability is due to insufficient protection against management plane flooding attacks. An attacker could exploit this vulnerability by sending a high rate of ICMP, SSH, or HTTP traffic to an affected device. A successful exploit could allow the attacker to cause the CPU of the device to increase, resulting in a denial of service (DoS) condition on the device manager web GUI, SSH, or API. Data traffic through the device is not affected.
Weakness: CWE-770
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Industrial Ethernet Switches | Routing & Switching | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Industrial Ethernet Switches
Vendor advisory
Cisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerability
Cisco’s rating: Medium (advisory CVSS 5.3) · Published Aug 19, 2026
Bug ID: CSCwp27607
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from