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Cisco Security Advisoriescisco-sa-ie1k-uxq86Lnx

Cisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerability

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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ie1k-uxq86Lnx Security Impact Rating: Medium CVE: CVE-2026-20177

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MediumCVSS not listedMedium severity
Scope

What the vendor says is affected

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Next step

What the vendor recommends

Cisco has released software updates that address this vulnerability.

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When this advisory changed

  1. Published by Cisco

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  2. Added to SecurityAlert

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Vulnerabilities

CVEs named in this advisory

CVE-2026-20177View CVSS, KEV, EPSS, and threat context
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