CVE-2026-20146Network attack vector

Arbitrary file read and deletion via path traversal

Published Jul 15, 2026 · Updated Jul 15, 2026

Path traversal in Cisco ISE and ISE-PIC 3.1 through 3.5 allows remote authenticated users to read or delete arbitrary files. The validFileNameOrPath method passes a user-supplied path to file operations without first validating that it remains within an allowed directory. Valid administrative credentials and a crafted HTTP request are required; successful exploitation accesses sensitive files or deletes arbitrary files as the iseadminportal user.

CVSS severity5.5
Medium
EPSS probability0.50%
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 ISE and ISE-PIC 3.1 through 3.5 allows remote authenticated users to read or delete arbitrary files. The validFileNameOrPath method passes a user-supplied path to file operations without first validating that it remains within an allowed directory. Valid administrative credentials and a crafted HTTP request are required; successful exploitation accesses sensitive files or deletes arbitrary files as the iseadminportal user.

The record

CVE
CVE-2026-20146
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
ClamAV
Product
Cisco Identity Services Engine
Classifications
CWE-22, T1005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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=3.1.0
  2. Affected versionversion=3.1.0 p1
  3. Affected versionversion=3.1.0 p10
  4. Affected versionversion=3.1.0 p2
  5. Affected versionversion=3.1.0 p3
  6. Affected versionversion=3.1.0 p4
  7. Affected versionversion=3.1.0 p5
  8. Affected versionversion=3.1.0 p6
  9. Affected versionversion=3.1.0 p7
  10. Affected versionversion=3.1.0 p8
  11. Affected versionversion=3.1.0 p9
  12. Affected versionversion=3.2.0
  13. Affected versionversion=3.2.0 p1
  14. Affected versionversion=3.2.0 p2
  15. Affected versionversion=3.2.0 p3
  16. Affected versionversion=3.2.0 p4
  17. Affected versionversion=3.2.0 p5
  18. Affected versionversion=3.2.0 p6
  19. Affected versionversion=3.2.0 p7
  20. Affected versionversion=3.2 Patch 8
  21. Affected versionversion=3.2 Patch 9
  22. Affected versionversion=3.3.0
  23. Affected versionversion=3.3 Patch 1
  24. Affected versionversion=3.3 Patch 10
  25. Affected versionversion=3.3 Patch 2
  26. Affected versionversion=3.3 Patch 3
  27. Affected versionversion=3.3 Patch 4
  28. Affected versionversion=3.3 Patch 5
  29. Affected versionversion=3.3 Patch 6
  30. Affected versionversion=3.3 Patch 7
  31. Affected versionversion=3.3 Patch 8
  32. Affected versionversion=3.3 Patch 9
  33. Affected versionversion=3.4.0
  34. Affected versionversion=3.4 Patch 1
  35. Affected versionversion=3.4 Patch 2
  36. Affected versionversion=3.4 Patch 3
  37. Affected versionversion=3.4 Patch 4
  38. Affected versionversion=3.4 Patch 5
  39. Affected versionversion=3.5.0
  40. Affected versionversion=3.5 Patch 1
  41. Affected versionversion=3.5 Patch 2
  42. Affected versionversion=3.5 Patch 3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ClamAV · Cisco Identity Services Engineversion=3.1.0; version=3.1.0 p1; version=3.1.0 p10; version=3.1.0 p2; version=3.1.0 p3; version=3.1.0 p4; version=3.1.0 p5; version=3.1.0 p6; version=3.1.0 p7; version=3.1.0 p8; version=3.1.0 p9; version=3.2.0; version=3.2.0 p1; version=3.2.0 p2; version=3.2.0 p3; version=3.2.0 p4; version=3.2.0 p5; version=3.2.0 p6; version=3.2.0 p7; version=3.2 Patch 8; version=3.2 Patch 9; version=3.3.0; version=3.3 Patch 1; version=3.3 Patch 10; version=3.3 Patch 2; version=3.3 Patch 3; version=3.3 Patch 4; version=3.3 Patch 5; version=3.3 Patch 6; version=3.3 Patch 7; version=3.3 Patch 8; version=3.3 Patch 9; version=3.4.0; version=3.4 Patch 1; version=3.4 Patch 2; version=3.4 Patch 3; version=3.4 Patch 4; version=3.4 Patch 5; version=3.5.0; version=3.5 Patch 1; version=3.5 Patch 2; version=3.5 Patch 3
ClamAV · Cisco ISE Passive Identity Connectorversion=3.1.0; version=3.2.0; version=3.3.0; version=3.4.0; version=3.5.0

Published CVSS scores

5.5Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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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