CVE-2026-20168Network attack vector

Authenticated file disclosure via insufficient access checks

Published May 6, 2026 · Updated May 6, 2026

Path traversal in Cisco IoT Field Network Director before 5.0.0-117 allows remote authenticated users to read unauthorized files. The web-based management interface accepts crafted input without sufficient file access checks and returns files outside the user's permissions. Low-privileged access to the interface is sufficient; the documented impact is unauthorized file disclosure without file modification or service interruption.

CVSS severity6.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Cisco IoT Field Network Director before 5.0.0-117 allows remote authenticated users to read unauthorized files. The web-based management interface accepts crafted input without sufficient file access checks and returns files outside the user's permissions. Low-privileged access to the interface is sufficient; the documented impact is unauthorized file disclosure without file modification or service interruption.

The record

CVE
CVE-2026-20168
Published
May 6, 2026
Updated
May 6, 2026
Vendor
ClamAV
Product
Cisco IoT Field Network Director
Classifications
CWE-388, T1005
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

6.5Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-3887PK - Errors
T1005Data from Local System

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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