Cisco IoT Field Network Director up to 4.12.1 Web-based Management Interface command injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in Cisco IoT Field Network Director. The affected element is an unknown function of the component Web-based Management Interface. The manipulation leads to command injection. This vulnerability is referenced as CVE-2026-20169. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IoT Field Network Director. It has been rated as critical. This issue affects an unknown functionality of the component Web-based Management Interface. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the web-based management interface of Cisco IoT Field Network Director could allow an authenticated, remote attacker with low privileges to access files and execute commands on a remote router. This vulnerability is due to insufficient input validation of user-supplied data. An attacker could exploit this vulnerability by submitting crafted input in the web-based management interface. A successful exploit could allow the attacker to create, read, or delete files and execute limited commands in user EXEC mode on a remote router.

The advisory is shared at sec.cloudapps.cisco.com. The identification of this vulnerability is CVE-2026-20169 since 10/08/2025. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/29/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• Cisco

Name

• IoT Field Network Director

Version

• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.2.0
• 4.3.0
• 4.3.1
• 4.3.2
• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.5.0
• 4.5.1
• 4.6.0
• 4.6.1
• 4.6.2
• 4.7.0
• 4.7.1
• 4.7.2
• 4.8.0
• 4.8.1
• 4.9.0
• 4.9.1
• 4.9.2
• 4.10.0
• 4.11.0
• 4.12.0
• 4.12.1

License

• commercial

Website

• Vendor: https://www.cisco.com/

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