CVE-2025-20261Network attack vector

Privilege escalation via crafted SSH connection syntax

Published Jun 4, 2025 · Updated Feb 26, 2026

Privilege escalation in Cisco Integrated Management Controller allows remote authenticated users to access elevated internal services over SSH. The SSH connection handler accepts crafted connection syntax without adequately restricting which internal service endpoint the session can reach. A valid IMC account and incoming SSH access are required; successful exploitation permits unauthorized system changes, including creation of administrator accounts.

CVSS severity8.8
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Cisco Integrated Management Controller allows remote authenticated users to access elevated internal services over SSH. The SSH connection handler accepts crafted connection syntax without adequately restricting which internal service endpoint the session can reach. A valid IMC account and incoming SSH access are required; successful exploitation permits unauthorized system changes, including creation of administrator accounts.

The record

CVE
CVE-2025-20261
Published
Jun 4, 2025
Updated
Feb 26, 2026
Vendor
ClamAV
Product
Cisco Unified Computing System (Managed)
Classifications
CWE-923, T1136
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 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=3.2(1d)
  2. Affected versionversion=3.2(2b)
  3. Affected versionversion=3.2(2c)
  4. Affected versionversion=3.2(2d)
  5. Affected versionversion=3.2(2e)
  6. Affected versionversion=3.2(2f)
  7. Affected versionversion=3.2(3a)
  8. Affected versionversion=3.2(3b)
  9. Affected versionversion=3.2(3d)
  10. Affected versionversion=3.2(3e)
  11. Affected versionversion=3.2(3g)
  12. Affected versionversion=3.2(3h)
  13. Affected versionversion=3.2(3i)
  14. Affected versionversion=3.2(3j)
  15. Affected versionversion=3.2(3k)
  16. Affected versionversion=3.2(3l)
  17. Affected versionversion=3.2(3n)
  18. Affected versionversion=3.2(3o)
  19. Affected versionversion=3.2(3p)
  20. Affected versionversion=4.0(1a)
  21. Affected versionversion=4.0(1b)
  22. Affected versionversion=4.0(1c)
  23. Affected versionversion=4.0(1d)
  24. Affected versionversion=4.0(2a)
  25. Affected versionversion=4.0(2b)
  26. Affected versionversion=4.0(2d)
  27. Affected versionversion=4.0(2e)
  28. Affected versionversion=4.0(4a)
  29. Affected versionversion=4.0(4b)
  30. Affected versionversion=4.0(4c)
  31. Affected versionversion=4.0(4d)
  32. Affected versionversion=4.0(4e)
  33. Affected versionversion=4.0(4f)
  34. Affected versionversion=4.0(4g)
  35. Affected versionversion=4.0(4h)
  36. Affected versionversion=4.0(4i)
  37. Affected versionversion=4.0(4k)
  38. Affected versionversion=4.0(4l)
  39. Affected versionversion=4.0(4m)
  40. Affected versionversion=4.0(4n)
  41. Affected versionversion=4.0(4o)
  42. Affected versionversion=4.1(1a)
  43. Affected versionversion=4.1(1b)
  44. Affected versionversion=4.1(1c)
  45. Affected versionversion=4.1(1d)
  46. Affected versionversion=4.1(1e)
  47. Affected versionversion=4.1(2a)
  48. Affected versionversion=4.1(2b)
  49. Affected versionversion=4.1(2c)
  50. Affected versionversion=4.1(3a)
  51. Affected versionversion=4.1(3b)
  52. Affected versionversion=4.1(3c)
  53. Affected versionversion=4.1(3d)
  54. Affected versionversion=4.1(3e)
  55. Affected versionversion=4.1(3f)
  56. Affected versionversion=4.1(3h)
  57. Affected versionversion=4.1(3i)
  58. Affected versionversion=4.1(3j)
  59. Affected versionversion=4.1(3k)
  60. Affected versionversion=4.1(3l)
  61. Affected versionversion=4.1(3m)
  62. Affected versionversion=4.1(3n)
  63. Affected versionversion=4.1(4a)
  64. Affected versionversion=4.2(1c)
  65. Affected versionversion=4.2(1d)
  66. Affected versionversion=4.2(1f)
  67. Affected versionversion=4.2(1i)
  68. Affected versionversion=4.2(1k)
  69. Affected versionversion=4.2(1l)
  70. Affected versionversion=4.2(1m)
  71. Affected versionversion=4.2(1n)
  72. Affected versionversion=4.2(2a)
  73. Affected versionversion=4.2(2c)
  74. Affected versionversion=4.2(2d)
  75. Affected versionversion=4.2(2e)
  76. Affected versionversion=4.2(3b)
  77. Affected versionversion=4.2(3d)
  78. Affected versionversion=4.2(3e)
  79. Affected versionversion=4.2(3g)
  80. Affected versionversion=4.2(3h)
  81. Affected versionversion=4.2(3i)
  82. Affected versionversion=4.2(3j)
  83. Affected versionversion=4.3(2b)
  84. Affected versionversion=4.3(2c)
  85. Affected versionversion=4.3(2e)
  86. Affected versionversion=4.3(2f)
  87. Affected versionversion=4.3(3a)
  88. Affected versionversion=4.3(3c)
  89. Affected versionversion=4.3(4a)
  90. Affected versionversion=4.3(4b)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Unified Computing System (Managed)version=3.2(1d); version=3.2(2b); version=3.2(2c); version=3.2(2d); version=3.2(2e); version=3.2(2f); version=3.2(3a); version=3.2(3b); version=3.2(3d); version=3.2(3e); version=3.2(3g); version=3.2(3h); version=3.2(3i); version=3.2(3j); version=3.2(3k); version=3.2(3l); version=3.2(3n); version=3.2(3o); version=3.2(3p); version=4.0(1a); version=4.0(1b); version=4.0(1c); version=4.0(1d); version=4.0(2a); version=4.0(2b); version=4.0(2d); version=4.0(2e); version=4.0(4a); version=4.0(4b); version=4.0(4c); version=4.0(4d); version=4.0(4e); version=4.0(4f); version=4.0(4g); version=4.0(4h); version=4.0(4i); version=4.0(4k); version=4.0(4l); version=4.0(4m); version=4.0(4n); version=4.0(4o); version=4.1(1a); version=4.1(1b); version=4.1(1c); version=4.1(1d); version=4.1(1e); version=4.1(2a); version=4.1(2b); version=4.1(2c); version=4.1(3a); version=4.1(3b); version=4.1(3c); version=4.1(3d); version=4.1(3e); version=4.1(3f); version=4.1(3h); version=4.1(3i); version=4.1(3j); version=4.1(3k); version=4.1(3l); version=4.1(3m); version=4.1(3n); version=4.1(4a); version=4.2(1c); version=4.2(1d); version=4.2(1f); version=4.2(1i); version=4.2(1k); version=4.2(1l); version=4.2(1m); version=4.2(1n); version=4.2(2a); version=4.2(2c); version=4.2(2d); version=4.2(2e); version=4.2(3b); version=4.2(3d); version=4.2(3e); version=4.2(3g); version=4.2(3h); version=4.2(3i); version=4.2(3j); version=4.3(2b); version=4.3(2c); version=4.3(2e); version=4.3(2f); version=4.3(3a); version=4.3(3c); version=4.3(4a); version=4.3(4b)
ClamAV · Cisco Unified Computing System (Standalone)version=3.1(1d); version=3.1(2b); version=3.1(2c); version=3.1(2d); version=3.1(2e); version=3.1(2g); version=3.1(2i); version=3.1(3a); version=3.1(3b); version=3.1(3c); version=3.1(3d); version=3.1(3g); version=3.1(3h); version=3.1(3i); version=3.1(3j); version=3.1(3k); version=4.0(1.240); version=4.0(1a); version=4.0(1b); version=4.0(1c); version=4.0(1d); version=4.0(1e); version=4.0(1g); version=4.0(1h); version=4.0(2c); version=4.0(2d); version=4.0(2f); version=4.0(2g); version=4.0(2h); version=4.0(2i); version=4.0(2k); version=4.0(2l); version=4.0(2m); version=4.0(2n); version=4.0(2o); version=4.0(2p); version=4.0(2q); version=4.0(2r); version=4.0(4b); version=4.0(4c); version=4.0(4d); version=4.0(4e); version=4.0(4f); version=4.0(4h); version=4.0(4i); version=4.0(4j); version=4.0(4k); version=4.0(4l); version=4.0(4m); version=4.0(4n); version=4.1(1c); version=4.1(1d); version=4.1(1f); version=4.1(1g); version=4.1(1h); version=4.1(2a); version=4.1(2b); version=4.1(2d); version=4.1(2e); version=4.1(2f); version=4.1(2g); version=4.1(2h); version=4.1(2j); version=4.1(2k); version=4.1(2l); version=4.1(2m); version=4.1(3b); version=4.1(3c); version=4.1(3d); version=4.1(3f); version=4.1(3g); version=4.1(3h); version=4.1(3i); version=4.1(3l); version=4.1(3m); version=4.1(3n); version=4.2(1a); version=4.2(1b); version=4.2(1c); version=4.2(1e); version=4.2(1f); version=4.2(1g); version=4.2(1i); version=4.2(1j); version=4.2(2a)

Published CVSS scores

8.8Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-923Improper Restriction of Communication Channel to Intended Endpoints
T1136Create Account

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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