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CVE-2026-20080— Cisco IEC6400 Edge Compute Appliance SSH Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco Ultra-Reliable Wireless Backhaul
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 IEC6400 Wireless Backhaul Edge Compute Software是美国思科（Cisco）公司的一个边缘计算设备的系统固件。 Cisco IEC6400 Wireless Backhaul Edge Compute Software存在资源管理错误漏洞，该漏洞源于SSH服务缺乏有效的洪水保护，可能导致未经验证的远程攻击者造成拒绝服务攻击。

CVSS 5.3 · Medium EPSS 0.37% · P29
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I. Basic Information for CVE-2026-20080

Vulnerability Information
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Vulnerability Title
Cisco IEC6400 Edge Compute Appliance SSH Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the SSH service of Cisco IEC6400 Wireless Backhaul Edge Compute Software could allow an unauthenticated, remote attacker to cause the SSH service to stop responding. This vulnerability exists because the SSH service lacks effective flood protection. An attacker could exploit this vulnerability by initiating a denial of service (DoS) attack against the SSH port. A successful exploit could allow the attacker to cause the SSH service to be unresponsive during the period of the DoS attack. All other operations remain stable during the attack.
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
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IEC6400 Wireless Backhaul Edge Compute Software 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IEC6400 Wireless Backhaul Edge Compute Software是美国思科（Cisco）公司的一个边缘计算设备的系统固件。 Cisco IEC6400 Wireless Backhaul Edge Compute Software存在资源管理错误漏洞，该漏洞源于SSH服务缺乏有效的洪水保护，可能导致未经验证的远程攻击者造成拒绝服务攻击。
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 Ultra-Reliable Wireless Backhaul 1.0.0 -

II. Public POCs for CVE-2026-20080

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III. Intelligence Information for CVE-2026-20080

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Same Patch Batch · Cisco · 2026-01-21 · 5 CVEs total

CVE-2026-20045 8.2 HIGH Cisco Unified Communications Products Remote Code Execution Vulnerability
CVE-2026-20092 6.0 MEDIUM Cisco Intersight Virtual Appliance Privilege Escalation Vulnerability
CVE-2026-20055 4.8 MEDIUM Cisco Packaged Contact Center Enterprise & Cisco Unified Contact Center Enterprise Cross-S
CVE-2026-20109 4.8 MEDIUM Cisco Packaged Contact Center Enterprise and Cisco Unified Contact Center Enterprise Cross

IV. Related Vulnerabilities

Same vendor: Cisco
Same weakness: CWE-400

V. Comments for CVE-2026-20080

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