CVE-2026-20177
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
A vulnerability in the handling of management plane packets by Cisco Industrial Ethernet 1000 Series Switches allows an unauthenticated remote attacker to cause the device manager, SSH, or API to become inaccessible. The issue is due to insufficient protection against management plane flooding attacks.
Risk Assessment
An attacker can cause CPU spikes and denial of service (DoS) for the management interface, SSH, or API, hindering device administration, while data traffic remains unaffected.
Recommendation
Apply vendor updates, restrict access to the management plane, and configure DoS protection mechanisms.
Other vulnerabilities in Cisco Industrial Ethernet 1000 Series Switches
See all- CVE-2017-6634High
A vulnerability in the Device Manager web interface of Cisco Industrial Ethernet 1000 Series Switches 1.3 could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack against a user of an affected system. The vulnerability is due to insufficient CSRF protection by the Device Manager web interface.
- CVE-2026-20232Medium
A vulnerability in the web-based management interface of Cisco Industrial Ethernet 1000 Series Switches allows an authenticated remote attacker to perform a stored XSS attack. The issue is due to insufficient input validation, enabling injection of malicious code into interface pages.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS