CVE-2026-76454Network attack vector

Unauthenticated file write via management API

Published Oct 7, 2026 · Updated Oct 7, 2026

Arbitrary file write in the Smart Licensing Utility API of Cisco License On-Prem allows remote attackers to alter system files. The management API lacks authentication and fails to validate crafted request input before permitting file writes or triggering an application service interruption. Exploitation requires network access to the affected API; the available advisory text does not identify a specific endpoint or file-writing function.

CVSS severityUnavailable
Unscored
EPSS probability0.58%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file write in the Smart Licensing Utility API of Cisco License On-Prem allows remote attackers to alter system files. The management API lacks authentication and fails to validate crafted request input before permitting file writes or triggering an application service interruption. Exploitation requires network access to the affected API; the available advisory text does not identify a specific endpoint or file-writing function.

The record

CVE
CVE-2026-76454
Published
Oct 7, 2026
Updated
Oct 7, 2026
Vendor
Cisco
Product
Cisco License On-Prem
Classifications
T1565
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10-202606
  2. Affected versionversion=1.1
  3. Affected versionversion=1.2
  4. Affected versionversion=1.3
  5. Affected versionversion=1.4
  6. Affected versionversion=6.3.0
  7. Affected versionversion=7-202001
  8. Affected versionversion=8-202004
  9. Affected versionversion=8-202006
  10. Affected versionversion=8-202008
  11. Affected versionversion=8-202010
  12. Affected versionversion=8-202012
  13. Affected versionversion=8-202102
  14. Affected versionversion=8-202105
  15. Affected versionversion=8-202108
  16. Affected versionversion=8-202112
  17. Affected versionversion=8-202201
  18. Affected versionversion=8-202206
  19. Affected versionversion=8-202212
  20. Affected versionversion=8-202302
  21. Affected versionversion=8-202303
  22. Affected versionversion=8-202304
  23. Affected versionversion=8-202308
  24. Affected versionversion=8-202401
  25. Affected versionversion=8-202404
  26. Affected versionversion=9-202201
  27. Affected versionversion=9-202406
  28. Affected versionversion=9-202407
  29. Affected versionversion=9-202410
  30. Affected versionversion=9-202412
  31. Affected versionversion=9-202501
  32. Affected versionversion=9-202502
  33. Affected versionversion=9-202504
  34. Affected versionversion=9-202507
  35. Affected versionversion=9-202510
  36. Affected versionversion=9-202601

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cisco · Cisco License On-Premversion=10-202606; version=1.1; version=1.2; version=1.3; version=1.4; version=6.3.0; version=7-202001; version=8-202004; version=8-202006; version=8-202008; version=8-202010; version=8-202012; version=8-202102; version=8-202105; version=8-202108; version=8-202112; version=8-202201; version=8-202206; version=8-202212; version=8-202302; version=8-202303; version=8-202304; version=8-202308; version=8-202401; version=8-202404; version=9-202201; version=9-202406; version=9-202407; version=9-202410; version=9-202412; version=9-202501; version=9-202502; version=9-202504; version=9-202507; version=9-202510; version=9-202601

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1565Data Manipulation

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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