SEPTEMBER 18, 2026
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Case File

CVE-2026-20177

MEDIUM · CVSS 5.3 EPSS 0.39% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-19 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

Cisco Industrial Ethernet 1000 Series Switches are vulnerable to a denial of service (DoS) attack due to insufficient protection against management plane flooding. An unauthenticated remote attacker can exploit this vulnerability by overwhelming the device with high rates of ICMP, SSH, or HTTP traffic, leading to inaccessibility of the device manager, SSH, or API, while data traffic remains unaffected. Organizations using these switches should prioritize remediation to safeguard against potential service disruptions.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-20177
Severity
MEDIUM
CVSS
5.3
EPSS
0.39%
Cisco

Original NVD 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.