CVE-2026-20167— Cisco IoT Field Network Director Remote Device Denial of Service Vulnerability
Possible ATT&CK Techniques 2AI
T1210 · Exploitation of Remote Services T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 30
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
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
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Advisory · 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)
- CVE-2026-20169
Cisco IoT Field Network Director Command Injection Vulnerabi - CVE-2026-20168
Cisco IoT Field Network Director Path Traversal Vulnerabilit - CVE-2020-3531
Cisco IoT Field Network Director Unauthenticated REST API Vu - CVE-2020-3392
Cisco IoT Field Network Director Missing API Authentication - CVE-2020-26081
Cisco IoT Field Network Director Cross-Site Scripting Vulner
Same vendor: Cisco
- CVE-2026-20224
Cisco Catalyst SD-WAN Manager XML External Entity Injection - CVE-2026-20210
Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerabi - CVE-2026-20209
Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerabi - CVE-2026-20182
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulne - CVE-2026-20219
Cisco Slido 安全漏洞
Same weakness: CWE-284
- CVE-2026-0856
Meona Client/Server Improper Access Control漏洞 - CVE-2026-34754
MantisBT allows unauthorized users to upload attachments to - CVE-2026-34390
MantisBT: Privilege Escalation from Manager to Administrator - CVE-2026-34358
CtrlPanel: Missing Authorization on Admin Write Endpoints Al - CVE-2026-34233
CtrlPanel has Missing Authentication Checks in Datatable Adm
V. Comments for CVE-2026-20167
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