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CVE-2026-20167— Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco IoT Field Network Director (IoT-FND)
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 IoT Field Network Director（IoT-FND）是美国思科（Cisco）公司的一套端到端的物联网管理系统。该系统具有设备管理、资产跟踪和智能计量等功能。 Cisco IoT Field Network Director存在访问控制错误漏洞，该漏洞源于错误处理不当，可能导致经过身份验证的远程攻击者通过提交特制输入请求远程路由器上的未授权文件，导致路由器重新加载并造成拒绝服务。

CVSS 7.7 · High EPSS 0.27% · P20

Affected Version Matrix 30

VendorProduct Version RangeStatus
Cisco Cisco IoT Field Network Director (IoT-FND) 4.5.1 affected
4.4.3 affected
4.1.0 affected
4.1.3 affected
4.6.1 affected
4.1.1 affected
4.4.0 affected
4.2.0 affected
… +22 more rows
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I. Basic Information for CVE-2026-20167

Vulnerability Information
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Vulnerability Title
Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the web-based management interface of Cisco IoT Field Network Director could allow an authenticated, remote attacker with low privileges to cause a DoS condition on a remotely managed router. This vulnerability is due to improper error handling. An attacker could exploit this vulnerability by submitting crafted input to the web-based management interface. A successful exploit could allow the attacker to request unauthorized files from a remote router, causing the router to reload and resulting in a DoS condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IoT Field Network Director 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IoT Field Network Director（IoT-FND）是美国思科（Cisco）公司的一套端到端的物联网管理系统。该系统具有设备管理、资产跟踪和智能计量等功能。 Cisco IoT Field Network Director存在访问控制错误漏洞，该漏洞源于错误处理不当，可能导致经过身份验证的远程攻击者通过提交特制输入请求远程路由器上的未授权文件，导致路由器重新加载并造成拒绝服务。
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 IoT Field Network Director (IoT-FND) 4.5.1 -

II. Public POCs for CVE-2026-20167

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III. Intelligence Information for CVE-2026-20167

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Vendor Advisories for CVE-2026-20167 (1)

Same Patch Batch · Cisco · 2026-05-06 · 12 CVEs total

CVE-2026-20034 8.8 HIGH Cisco Unity Connection Remote Code Execution Vulnerability
CVE-2026-20185 7.7 HIGH Cisco SG350 and SG350X Series Managed Switches SNMP Denial of Service Vunerability
CVE-2026-20035 7.2 HIGH Cisco Unity Connection Server-Side Request Forgery Vulnerability
CVE-2026-20168 6.5 MEDIUM Cisco IoT Field Network Director Path Traversal Vulnerability
CVE-2026-20169 6.4 MEDIUM Cisco IoT Field Network Director Command Injection Vulnerability
CVE-2026-20219 5.4 MEDIUM Cisco Slido 安全漏洞
CVE-2026-20195 5.3 MEDIUM Cisco Identity Services Engine Observable Response Discrepancy Vulnerability
CVE-2026-20193 4.3 MEDIUM Cisco Identity Services Engine Authentication Bypass Vulnerability
CVE-2026-20189 4.3 MEDIUM Cisco Prime Infrastructure Information Disclosure Vulnerability
CVE-2026-20172 4.3 MEDIUM Cisco Enterprise Chat and Email Lite Agent File Upload Vulnerability
CVE-2026-20188 Cisco Crosswork Network Controller and Cisco Network Services Orchestrator Advisory

IV. Related Vulnerabilities

Same product: Cisco IoT Field Network Director (IoT-FND)
Same vendor: Cisco
Same weakness: CWE-284

V. Comments for CVE-2026-20167

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