CVE-2025-20376Network attack vector

Root command execution via insufficiently validated upload

Published Nov 5, 2025 · Updated Nov 5, 2025

Arbitrary file upload in Cisco Unified Contact Center Express 12.5 SU3 and earlier and 15.0 allows remote authenticated users to execute commands. The web UI's file-upload mechanism insufficiently validates uploaded content, allowing a malicious file to be stored and executed on the appliance. Valid administrative credentials are required, and successful exploitation runs arbitrary commands on the underlying system with root privileges.

CVSS severity6.5
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Cisco Unified Contact Center Express 12.5 SU3 and earlier and 15.0 allows remote authenticated users to execute commands. The web UI's file-upload mechanism insufficiently validates uploaded content, allowing a malicious file to be stored and executed on the appliance. Valid administrative credentials are required, and successful exploitation runs arbitrary commands on the underlying system with root privileges.

The record

CVE
CVE-2025-20376
Published
Nov 5, 2025
Updated
Nov 5, 2025
Vendor
ClamAV
Product
Cisco Unified Contact Center Express
Classifications
CWE-434, T1068
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 5, 2025Record 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=10.5(1)
  2. Affected versionversion=10.5(1)SU1
  3. Affected versionversion=10.5(1)SU1ES10
  4. Affected versionversion=10.6(1)
  5. Affected versionversion=10.6(1)SU1
  6. Affected versionversion=10.6(1)SU2
  7. Affected versionversion=10.6(1)SU2ES04
  8. Affected versionversion=10.6(1)SU3
  9. Affected versionversion=10.6(1)SU3ES01
  10. Affected versionversion=10.6(1)SU3ES02
  11. Affected versionversion=10.6(1)SU3ES03
  12. Affected versionversion=11.0(1)SU1
  13. Affected versionversion=11.0(1)SU1ES02
  14. Affected versionversion=11.0(1)SU1ES03
  15. Affected versionversion=11.5(1)ES01
  16. Affected versionversion=11.5(1)SU1
  17. Affected versionversion=11.5(1)SU1ES01
  18. Affected versionversion=11.5(1)SU1ES02
  19. Affected versionversion=11.5(1)SU1ES03
  20. Affected versionversion=11.6(1)
  21. Affected versionversion=11.6(1)ES01
  22. Affected versionversion=11.6(1)ES02
  23. Affected versionversion=11.6(2)
  24. Affected versionversion=11.6(2)ES01
  25. Affected versionversion=11.6(2)ES02
  26. Affected versionversion=11.6(2)ES03
  27. Affected versionversion=11.6(2)ES04
  28. Affected versionversion=11.6(2)ES05
  29. Affected versionversion=11.6(2)ES06
  30. Affected versionversion=11.6(2)ES07
  31. Affected versionversion=11.6(2)ES08
  32. Affected versionversion=12.0(1)
  33. Affected versionversion=12.0(1)ES01
  34. Affected versionversion=12.0(1)ES02
  35. Affected versionversion=12.0(1)ES03
  36. Affected versionversion=12.0(1)ES04
  37. Affected versionversion=12.5(1)
  38. Affected versionversion=12.5(1)ES01
  39. Affected versionversion=12.5(1)ES02
  40. Affected versionversion=12.5(1)ES03
  41. Affected versionversion=12.5(1)_SU01_ES01
  42. Affected versionversion=12.5(1)_SU01_ES02
  43. Affected versionversion=12.5(1)_SU01_ES03
  44. Affected versionversion=12.5(1)_SU02_ES01
  45. Affected versionversion=12.5(1)_SU02_ES02
  46. Affected versionversion=12.5(1)_SU02_ES03
  47. Affected versionversion=12.5(1)_SU02_ES04
  48. Affected versionversion=12.5(1)_SU03_ES01
  49. Affected versionversion=12.5(1)_SU03_ES02
  50. Affected versionversion=12.5(1)_SU03_ES03
  51. Affected versionversion=12.5(1)_SU03_ES04
  52. Affected versionversion=12.5(1)_SU03_ES05
  53. Affected versionversion=12.5(1)_SU03_ES06
  54. Affected versionversion=12.5(1)SU1
  55. Affected versionversion=12.5(1)SU2
  56. Affected versionversion=12.5(1)SU3
  57. Affected versionversion=UCCX 15.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ClamAV · Cisco Unified Contact Center Expressversion=10.5(1); version=10.5(1)SU1; version=10.5(1)SU1ES10; version=10.6(1); version=10.6(1)SU1; version=10.6(1)SU2; version=10.6(1)SU2ES04; version=10.6(1)SU3; version=10.6(1)SU3ES01; version=10.6(1)SU3ES02; version=10.6(1)SU3ES03; version=11.0(1)SU1; version=11.0(1)SU1ES02; version=11.0(1)SU1ES03; version=11.5(1)ES01; version=11.5(1)SU1; version=11.5(1)SU1ES01; version=11.5(1)SU1ES02; version=11.5(1)SU1ES03; version=11.6(1); version=11.6(1)ES01; version=11.6(1)ES02; version=11.6(2); version=11.6(2)ES01; version=11.6(2)ES02; version=11.6(2)ES03; version=11.6(2)ES04; version=11.6(2)ES05; version=11.6(2)ES06; version=11.6(2)ES07; version=11.6(2)ES08; version=12.0(1); version=12.0(1)ES01; version=12.0(1)ES02; version=12.0(1)ES03; version=12.0(1)ES04; version=12.5(1); version=12.5(1)ES01; version=12.5(1)ES02; version=12.5(1)ES03; version=12.5(1)_SU01_ES01; version=12.5(1)_SU01_ES02; version=12.5(1)_SU01_ES03; version=12.5(1)_SU02_ES01; version=12.5(1)_SU02_ES02; version=12.5(1)_SU02_ES03; version=12.5(1)_SU02_ES04; version=12.5(1)_SU03_ES01; version=12.5(1)_SU03_ES02; version=12.5(1)_SU03_ES03; version=12.5(1)_SU03_ES04; version=12.5(1)_SU03_ES05; version=12.5(1)_SU03_ES06; version=12.5(1)SU1; version=12.5(1)SU2; version=12.5(1)SU3; version=UCCX 15.0.1

Published CVSS scores

6.5Cisco PSIRTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:X/RL:X/RC:X

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-434Unrestricted Upload of File with Dangerous Type
T1068Exploitation for Privilege Escalation

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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