CVE-2026-20177

Summary

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.

Affected Software

VendorProductVersion RangeStatus
CiscoCisco Industrial Ethernet Switches1.1affected
CiscoCisco Industrial Ethernet Switches1.2affected
CiscoCisco Industrial Ethernet Switches1.8.0affected
CiscoCisco Industrial Ethernet Switches1.8.2affected
CiscoCisco Industrial Ethernet Switches1.7.0affected
CiscoCisco Industrial Ethernet Switches1.3affected
CiscoCisco Industrial Ethernet Switches1.9.1affected
CiscoCisco Industrial Ethernet Switches1.6affected
CiscoCisco Industrial Ethernet Switches1.8.1affected
CiscoCisco Industrial Ethernet Switches1.9.2affected
CiscoCisco Industrial Ethernet Switches1.9.2aaffected
CiscoCisco Industrial Ethernet Switches1.9.3affected
CiscoCisco Industrial Ethernet Switches1.9.4affected
CiscoCisco Industrial Ethernet Switches1.9.5affected

Weaknesses

  • CWE-770: Allocation of Resources Without Limits or Throttling

References