CVE-2026-20200Public exploitNetwork attack vector

Root command execution via curl argument injection

Published Aug 5, 2026 · Updated Aug 5, 2026

Argument injection in Cisco IMC on UCS C-Series M7 and M8 servers allows remote authenticated users to execute commands as root. The SSH-key download feature passes incompletely filtered API parameters through download_ssh_keys.sh as curl arguments, allowing option injection. A low-privileged account with network access to the web interface is sufficient to read or write controller files and run arbitrary root commands.

CVSS severity8.8
High
EPSS probability5.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Argument injection in Cisco IMC on UCS C-Series M7 and M8 servers allows remote authenticated users to execute commands as root. The SSH-key download feature passes incompletely filtered API parameters through download_ssh_keys.sh as curl arguments, allowing option injection. A low-privileged account with network access to the web interface is sufficient to read or write controller files and run arbitrary root commands.

The record

CVE
CVE-2026-20200
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
ClamAV
Product
Cisco Unified Computing System (Standalone)
Classifications
CWE-141, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.3(1.230097)
  2. Affected versionversion=4.3(1.230124)
  3. Affected versionversion=4.3(1.230138)
  4. Affected versionversion=4.3(2.230207)
  5. Affected versionversion=4.3(2.230270)
  6. Affected versionversion=4.3(2.240002)
  7. Affected versionversion=4.3(3.240022)
  8. Affected versionversion=4.3(3.240043)
  9. Affected versionversion=4.3(4.240142)
  10. Affected versionversion=4.3(4.240152)
  11. Affected versionversion=4.3(4.241014)
  12. Affected versionversion=4.3(4.241063)
  13. Affected versionversion=4.3(4.242028)
  14. Affected versionversion=4.3(4.242038)
  15. Affected versionversion=4.3(4.242066)
  16. Affected versionversion=4.3(4.252001)
  17. Affected versionversion=4.3(4.252002)
  18. Affected versionversion=4.3(5.240021)
  19. Affected versionversion=4.3(5.250001)
  20. Affected versionversion=4.3(5.250030)
  21. Affected versionversion=4.3(5.250033)
  22. Affected versionversion=4.3(5.250043)
  23. Affected versionversion=4.3(5.250045)
  24. Affected versionversion=4.3(6.250039)
  25. Affected versionversion=4.3(6.250040)
  26. Affected versionversion=4.3(6.250044)
  27. Affected versionversion=4.3(6.250053)
  28. Affected versionversion=4.3(6.250060)
  29. Affected versionversion=4.3(6.250101)
  30. Affected versionversion=4.3(6.250117)
  31. Affected versionversion=4.3(6.260003)
  32. Affected versionversion=4.3(6.260017)
  33. Affected versionversion=6.0(1.250127)
  34. Affected versionversion=6.0(1.250130)
  35. Affected versionversion=6.0(1.250131)
  36. Affected versionversion=6.0(1.250174)
  37. Affected versionversion=6.0(1.250192)
  38. Affected versionversion=6.0(1.250194)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Unified Computing System (Standalone)version=4.3(1.230097); version=4.3(1.230124); version=4.3(1.230138); version=4.3(2.230207); version=4.3(2.230270); version=4.3(2.240002); version=4.3(3.240022); version=4.3(3.240043); version=4.3(4.240142); version=4.3(4.240152); version=4.3(4.241014); version=4.3(4.241063); version=4.3(4.242028); version=4.3(4.242038); version=4.3(4.242066); version=4.3(4.252001); version=4.3(4.252002); version=4.3(5.240021); version=4.3(5.250001); version=4.3(5.250030); version=4.3(5.250033); version=4.3(5.250043); version=4.3(5.250045); version=4.3(6.250039); version=4.3(6.250040); version=4.3(6.250044); version=4.3(6.250053); version=4.3(6.250060); version=4.3(6.250101); version=4.3(6.250117); version=4.3(6.260003); version=4.3(6.260017); version=6.0(1.250127); version=6.0(1.250130); version=6.0(1.250131); version=6.0(1.250174); version=6.0(1.250192); version=6.0(1.250194)

Published CVSS scores

8.8CiscoCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-141Improper Neutralization of Parameter/Argument Delimiters
T1068Exploitation for Privilege Escalation

Public exploit references

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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