CVE-2026-20177— Cisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerability
Quick assessment
Affected
Cisco Cisco Industrial Ethernet Switches
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Cisco Industrial Ethernet Switches是美国Cisco公司的一款坚固耐用的工业以太网交换机。 Cisco Industrial Ethernet Switches存在资源管理错误漏洞，该漏洞源于管理平面数据包处理中针对泛洪攻击的保护不足，攻击者通过向设备发送大量ICMP、SSH或HTTP流量，可导致设备CPU升高，造成设备管理器Web GUI、SSH或API拒绝服务。
Possible ATT&CK Techniques 2 AI
T1498 · Network Denial of Service T1499 · Endpoint Denial of ServiceAffected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Cisco | Cisco Industrial Ethernet Switches | 1.1 |
affected |
1.2 |
affected | ||
1.8.0 |
affected | ||
1.8.2 |
affected | ||
1.7.0 |
affected | ||
1.3 |
affected | ||
1.9.1 |
affected | ||
1.6 |
affected | ||
| … +6 more rows | |||
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I. Basic Information for CVE-2026-20177
Vulnerability Information
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Vulnerability Title
Cisco Industrial Ethernet 1000 Series Switches Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Industrial Ethernet Switches 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Industrial Ethernet Switches是美国Cisco公司的一款坚固耐用的工业以太网交换机。 Cisco Industrial Ethernet Switches存在资源管理错误漏洞，该漏洞源于管理平面数据包处理中针对泛洪攻击的保护不足，攻击者通过向设备发送大量ICMP、SSH或HTTP流量，可导致设备CPU升高，造成设备管理器Web GUI、SSH或API拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco Industrial Ethernet Switches | 1.1 | - |
|
II. Public POCs for CVE-2026-20177
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-20177 (1)
Same Patch Batch · Cisco · 2026-08-19 · 15 CVEs total
| CVE-2026-20030 | 10.0 CRITICAL | Cisco Crosswork Security Hardening Release: August 2026 |
| CVE-2026-20358 | 10.0 CRITICAL | Cisco Crosswork Security Hardening Release: August 2026 |
| CVE-2026-20357 | 10.0 CRITICAL | Cisco Crosswork Security Hardening Release: August 2026 |
| CVE-2026-20317 | 10.0 CRITICAL | Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Authentic |
| CVE-2026-20315 | 10.0 CRITICAL | Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Access Co |
| CVE-2026-20231 | 9.9 CRITICAL | Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Neutraliz |
| CVE-2026-20359 | 9.9 CRITICAL | Cisco Crosswork Security Hardening Release: August 2026 |
| CVE-2026-20318 | 9.6 CRITICAL | Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Input Val |
| CVE-2026-20319 | 7.5 HIGH | Cisco Secure Workload Software Security Hardening Release August 2026 - Buffer Management |
| CVE-2026-20320 | 7.5 HIGH | Cisco BroadWorks 输入验证错误漏洞 |
| CVE-2026-20327 | 6.5 MEDIUM | Cisco Unified Intelligence Center SQL Injection Vulnerability |
| CVE-2026-20302 | 6.1 MEDIUM | Cisco RoomOS Stack Overflow Vulnerability |
| CVE-2026-20232 | 5.4 MEDIUM | Cisco Industrial Ethernet 1000 Series Switches Stored Cross-Site Scripting Vulnerability |
| CVE-2026-20314 | 5.0 MEDIUM | Cisco Packaged Contact Center Enterprise & Cisco Unified Contact Center Enterprise Server- |
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V. Comments for CVE-2026-20177
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