CVE-2025-20124Network attack vector

Root command execution via unsafe Java deserialization

Published Feb 5, 2025 · Updated Feb 26, 2026

Insecure deserialization in Cisco ISE and ISE-PIC allows remote authenticated users to execute arbitrary commands as root. An affected API deserializes user-supplied Java byte streams without safely restricting object construction, so a crafted serialized object reaches command execution. Valid read-only administrative credentials are sufficient; successful exploitation grants full device control and can interrupt authentication during a single-node reload.

CVSS severity9.9
Critical
EPSS probability18.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure deserialization in Cisco ISE and ISE-PIC allows remote authenticated users to execute arbitrary commands as root. An affected API deserializes user-supplied Java byte streams without safely restricting object construction, so a crafted serialized object reaches command execution. Valid read-only administrative credentials are sufficient; successful exploitation grants full device control and can interrupt authentication during a single-node reload.

The record

CVE
CVE-2025-20124
Published
Feb 5, 2025
Updated
Feb 26, 2026
Vendor
ClamAV
Product
Cisco Identity Services Engine
Classifications
CWE-502, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 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=2.7.0 p8
  2. Affected versionversion=3.0.0
  3. Affected versionversion=3.0.0 p1
  4. Affected versionversion=3.0.0 p2
  5. Affected versionversion=3.0.0 p3
  6. Affected versionversion=3.0.0 p4
  7. Affected versionversion=3.0.0 p5
  8. Affected versionversion=3.0.0 p6
  9. Affected versionversion=3.0.0 p7
  10. Affected versionversion=3.0.0 p8
  11. Affected versionversion=3.1.0
  12. Affected versionversion=3.1.0 p1
  13. Affected versionversion=3.1.0 p2
  14. Affected versionversion=3.1.0 p3
  15. Affected versionversion=3.1.0 p4
  16. Affected versionversion=3.1.0 p5
  17. Affected versionversion=3.1.0 p6
  18. Affected versionversion=3.1.0 p7
  19. Affected versionversion=3.1.0 p8
  20. Affected versionversion=3.1.0 p9
  21. Affected versionversion=3.2.0
  22. Affected versionversion=3.2.0 p1
  23. Affected versionversion=3.2.0 p2
  24. Affected versionversion=3.2.0 p3
  25. Affected versionversion=3.2.0 p4
  26. Affected versionversion=3.2.0 p5
  27. Affected versionversion=3.2.0 p6
  28. Affected versionversion=3.3.0
  29. Affected versionversion=3.3 Patch 1
  30. Affected versionversion=3.3 Patch 2
  31. Affected versionversion=3.3 Patch 3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Identity Services Engineversion=2.7.0 p8; version=3.0.0; version=3.0.0 p1; version=3.0.0 p2; version=3.0.0 p3; version=3.0.0 p4; version=3.0.0 p5; version=3.0.0 p6; version=3.0.0 p7; version=3.0.0 p8; version=3.1.0; version=3.1.0 p1; 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=3.3.0; version=3.3 Patch 1; version=3.3 Patch 2; version=3.3 Patch 3
ClamAV · Cisco ISE Passive Identity Connectorversion=3.0.0; version=3.1.0; version=3.2.0; version=3.3.0

Published CVSS scores

9.9Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H

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-502Deserialization of Untrusted Data
T1210Exploitation of Remote Services

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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