CVE-2025-20334Network attack vector

Root command execution via HTTP API injection

Published Sep 24, 2025 · Updated Sep 24, 2025

Command injection in the HTTP API subsystem of Cisco IOS XE Software allows remote attackers to execute commands as root. The subsystem fails to validate crafted API input before passing it into operating-system command execution. Exploitation requires either administrative API credentials or an administrator with an active session to follow a crafted link; success grants full root command execution on the device.

CVSS severity8.8
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in the HTTP API subsystem of Cisco IOS XE Software allows remote attackers to execute commands as root. The subsystem fails to validate crafted API input before passing it into operating-system command execution. Exploitation requires either administrative API credentials or an administrator with an active session to follow a crafted link; success grants full root command execution on the device.

The record

CVE
CVE-2025-20334
Published
Sep 24, 2025
Updated
Sep 24, 2025
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-77, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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=17.12.2
  2. Affected versionversion=17.12.2a
  3. Affected versionversion=17.12.3
  4. Affected versionversion=17.12.3a
  5. Affected versionversion=17.12.4
  6. Affected versionversion=17.12.4a
  7. Affected versionversion=17.12.4b
  8. Affected versionversion=17.12.5
  9. Affected versionversion=17.12.5a
  10. Affected versionversion=17.12.5b
  11. Affected versionversion=17.12.5c
  12. Affected versionversion=17.13.1
  13. Affected versionversion=17.13.1a
  14. Affected versionversion=17.14.1
  15. Affected versionversion=17.14.1a
  16. Affected versionversion=17.15.1
  17. Affected versionversion=17.15.1a
  18. Affected versionversion=17.15.1b
  19. Affected versionversion=17.15.1w
  20. Affected versionversion=17.15.1x
  21. Affected versionversion=17.15.1y
  22. Affected versionversion=17.15.1z
  23. Affected versionversion=17.15.2
  24. Affected versionversion=17.15.2a
  25. Affected versionversion=17.15.2b
  26. Affected versionversion=17.15.2c
  27. Affected versionversion=17.16.1
  28. Affected versionversion=17.16.1a
  29. Affected versionversion=17.9.5
  30. Affected versionversion=17.9.5a
  31. Affected versionversion=17.9.5b
  32. Affected versionversion=17.9.5e
  33. Affected versionversion=17.9.5f
  34. Affected versionversion=17.9.6
  35. Affected versionversion=17.9.6a
  36. Affected versionversion=17.9.7
  37. Affected versionversion=17.9.7a
  38. Affected versionversion=17.9.7b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco IOS XE Softwareversion=17.12.2; version=17.12.2a; version=17.12.3; version=17.12.3a; version=17.12.4; version=17.12.4a; version=17.12.4b; version=17.12.5; version=17.12.5a; version=17.12.5b; version=17.12.5c; version=17.13.1; version=17.13.1a; version=17.14.1; version=17.14.1a; version=17.15.1; version=17.15.1a; version=17.15.1b; version=17.15.1w; version=17.15.1x; version=17.15.1y; version=17.15.1z; version=17.15.2; version=17.15.2a; version=17.15.2b; version=17.15.2c; version=17.16.1; version=17.16.1a; version=17.9.5; version=17.9.5a; version=17.9.5b; version=17.9.5e; version=17.9.5f; version=17.9.6; version=17.9.6a; version=17.9.7; version=17.9.7a; version=17.9.7b

Published CVSS scores

8.8Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1190Exploit Public-Facing Application

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo