CVE-2026-20169Network attack vector

Authenticated router command execution via crafted web input

Published May 6, 2026 · Updated May 6, 2026

Command injection in Cisco IoT Field Network Director 4.12.1 and earlier allows remote authenticated users to alter files and run router commands. The web interface passes crafted user input into remote-router file and command operations without sufficient validation; Cisco has not identified the affected endpoint or function. Low-privilege access to IoT FND is required, and successful exploitation is limited to creating, reading, or deleting router files and running commands in user EXEC mode.

CVSS severity6.4
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Cisco IoT Field Network Director 4.12.1 and earlier allows remote authenticated users to alter files and run router commands. The web interface passes crafted user input into remote-router file and command operations without sufficient validation; Cisco has not identified the affected endpoint or function. Low-privilege access to IoT FND is required, and successful exploitation is limited to creating, reading, or deleting router files and running commands in user EXEC mode.

The record

CVE
CVE-2026-20169
Published
May 6, 2026
Updated
May 6, 2026
Vendor
ClamAV
Product
Cisco IoT Field Network Director
Classifications
CWE-77, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.1.0
  2. Affected versionversion=4.10.0
  3. Affected versionversion=4.1.1
  4. Affected versionversion=4.11.0
  5. Affected versionversion=4.1.2
  6. Affected versionversion=4.12.0
  7. Affected versionversion=4.12.1
  8. Affected versionversion=4.1.3
  9. Affected versionversion=4.2.0
  10. Affected versionversion=4.3.0
  11. Affected versionversion=4.3.1
  12. Affected versionversion=4.3.2
  13. Affected versionversion=4.4.0
  14. Affected versionversion=4.4.1
  15. Affected versionversion=4.4.2
  16. Affected versionversion=4.4.3
  17. Affected versionversion=4.4.4
  18. Affected versionversion=4.5.0
  19. Affected versionversion=4.5.1
  20. Affected versionversion=4.6.0
  21. Affected versionversion=4.6.1
  22. Affected versionversion=4.6.2
  23. Affected versionversion=4.7.0
  24. Affected versionversion=4.7.1
  25. Affected versionversion=4.7.2
  26. Affected versionversion=4.8.0
  27. Affected versionversion=4.8.1
  28. Affected versionversion=4.9.0
  29. Affected versionversion=4.9.1
  30. Affected versionversion=4.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco IoT Field Network Directorversion=4.1.0; version=4.10.0; version=4.1.1; version=4.11.0; version=4.1.2; version=4.12.0; version=4.12.1; version=4.1.3; version=4.2.0; version=4.3.0; version=4.3.1; version=4.3.2; version=4.4.0; version=4.4.1; version=4.4.2; version=4.4.3; version=4.4.4; version=4.5.0; version=4.5.1; version=4.6.0; version=4.6.1; version=4.6.2; version=4.7.0; version=4.7.1; version=4.7.2; version=4.8.0; version=4.8.1; version=4.9.0; version=4.9.1; version=4.9.2

Published CVSS scores

6.4Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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