CVE-2025-20293Network attack vector

Unauthorized device enrollment via lingering SCEP service

Published Sep 24, 2025 · Updated Sep 24, 2025

Improper cleanup in Cisco IOS XE Software for Catalyst 9800-CL allows remote attackers to obtain certificates via SCEP requests. The Day One setup process leaves the hostname_WLC_CA PKI server reachable after setup, so it continues accepting unauthenticated certificate requests. No authentication or special configuration is required on affected cloud controllers; the certificate lets an attacker-controlled device join the virtual wireless controller.

CVSS severity5.3
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper cleanup in Cisco IOS XE Software for Catalyst 9800-CL allows remote attackers to obtain certificates via SCEP requests. The Day One setup process leaves the hostname_WLC_CA PKI server reachable after setup, so it continues accepting unauthenticated certificate requests. No authentication or special configuration is required on affected cloud controllers; the certificate lets an attacker-controlled device join the virtual wireless controller.

The record

CVE
CVE-2025-20293
Published
Sep 24, 2025
Updated
Sep 24, 2025
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-459, T1649
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=16.10.1
  2. Affected versionversion=16.10.1e
  3. Affected versionversion=16.10.1s
  4. Affected versionversion=16.11.1
  5. Affected versionversion=16.11.1a
  6. Affected versionversion=16.11.1b
  7. Affected versionversion=16.12.1
  8. Affected versionversion=16.12.1s
  9. Affected versionversion=16.12.1t
  10. Affected versionversion=16.12.2s
  11. Affected versionversion=16.12.3
  12. Affected versionversion=16.12.3s
  13. Affected versionversion=16.12.4
  14. Affected versionversion=16.12.4a
  15. Affected versionversion=16.12.5
  16. Affected versionversion=16.12.6
  17. Affected versionversion=16.12.6a
  18. Affected versionversion=16.12.7
  19. Affected versionversion=16.12.8
  20. Affected versionversion=17.10.1
  21. Affected versionversion=17.1.1
  22. Affected versionversion=17.11.1
  23. Affected versionversion=17.1.1s
  24. Affected versionversion=17.1.1t
  25. Affected versionversion=17.12.1
  26. Affected versionversion=17.12.2
  27. Affected versionversion=17.1.3
  28. Affected versionversion=17.13.1
  29. Affected versionversion=17.2.1
  30. Affected versionversion=17.2.1a
  31. Affected versionversion=17.3.1
  32. Affected versionversion=17.3.2
  33. Affected versionversion=17.3.2a
  34. Affected versionversion=17.3.3
  35. Affected versionversion=17.3.4
  36. Affected versionversion=17.3.4c
  37. Affected versionversion=17.3.5
  38. Affected versionversion=17.3.5a
  39. Affected versionversion=17.3.5b
  40. Affected versionversion=17.3.6
  41. Affected versionversion=17.3.7
  42. Affected versionversion=17.3.8
  43. Affected versionversion=17.3.8a
  44. Affected versionversion=17.4.1
  45. Affected versionversion=17.5.1
  46. Affected versionversion=17.6.1
  47. Affected versionversion=17.6.2
  48. Affected versionversion=17.6.3
  49. Affected versionversion=17.6.4
  50. Affected versionversion=17.6.5
  51. Affected versionversion=17.6.5a
  52. Affected versionversion=17.6.6
  53. Affected versionversion=17.6.6a
  54. Affected versionversion=17.6.7
  55. Affected versionversion=17.6.8
  56. Affected versionversion=17.7.1
  57. Affected versionversion=17.8.1
  58. Affected versionversion=17.9.1
  59. Affected versionversion=17.9.2
  60. Affected versionversion=17.9.3
  61. Affected versionversion=17.9.4
  62. Affected versionversion=17.9.4a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco IOS XE Softwareversion=16.10.1; version=16.10.1e; version=16.10.1s; version=16.11.1; version=16.11.1a; version=16.11.1b; version=16.12.1; version=16.12.1s; version=16.12.1t; version=16.12.2s; version=16.12.3; version=16.12.3s; version=16.12.4; version=16.12.4a; version=16.12.5; version=16.12.6; version=16.12.6a; version=16.12.7; version=16.12.8; version=17.10.1; version=17.1.1; version=17.11.1; version=17.1.1s; version=17.1.1t; version=17.12.1; version=17.12.2; version=17.1.3; version=17.13.1; version=17.2.1; version=17.2.1a; version=17.3.1; version=17.3.2; version=17.3.2a; version=17.3.3; version=17.3.4; version=17.3.4c; version=17.3.5; version=17.3.5a; version=17.3.5b; version=17.3.6; version=17.3.7; version=17.3.8; version=17.3.8a; version=17.4.1; version=17.5.1; version=17.6.1; version=17.6.2; version=17.6.3; version=17.6.4; version=17.6.5; version=17.6.5a; version=17.6.6; version=17.6.6a; version=17.6.7; version=17.6.8; version=17.7.1; version=17.8.1; version=17.9.1; version=17.9.2; version=17.9.3; version=17.9.4; version=17.9.4a

Published CVSS scores

5.3CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-459Incomplete Cleanup
T1649Steal or Forge Authentication Certificates

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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