TI-2026-16384 Aliases CVE-2026-20177 GHSA-rvq7-6xgp-76jg

Cisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerability

LOW 31CWE-770Published 2026-08-19 · Updated 2026-08-20

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00512 43rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Industrial Ethernet Switches	1.1; 1.2; 1.8.0; 1.8.2; 1.7.0; 1.3; 1.9.1; 1.6; 1.8.1; 1.9.2; 1.9.2a; 1.9.3; 1.9.4; 1.9.5	—	No fix listed	CNA

Cisco Industrial Ethernet Switches VendorCisco Affected 1.1; 1.2; 1.8.0; 1.8.2; 1.7.0; 1.3; 1.9.1; 1.6; 1.8.1; 1.9.2; 1.9.2a; 1.9.3; 1.9.4; 1.9.5 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-20177
2026-10-03 Alias added: GHSA-rvq7-6xgp-76jg

References

Other 1

cisco-sa-ie1k-uxq86Lnx

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TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0

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Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences