CVE-2025-20234Network attack vector

Scanning-process crash via UDF buffer overread

Published Jun 18, 2025 · Updated Jun 18, 2025

Out-of-bounds read in ClamAV UDF processing in Cisco Secure Endpoint allows remote attackers to crash its scanner via crafted UDF files. During UDF scanning, the parser reads beyond the supplied file buffer while processing malformed UDF content. No authentication or user interaction is required, but the file must reach an enabled scan; exploitation interrupts scanning without destabilizing the host.

CVSS severity5.3
Medium
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in ClamAV UDF processing in Cisco Secure Endpoint allows remote attackers to crash its scanner via crafted UDF files. During UDF scanning, the parser reads beyond the supplied file buffer while processing malformed UDF content. No authentication or user interaction is required, but the file must reach an enabled scan; exploitation interrupts scanning without destabilizing the host.

The record

CVE
CVE-2025-20234
Published
Jun 18, 2025
Updated
Jun 18, 2025
Vendor
ClamAV
Product
Cisco Secure Endpoint
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 18, 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=1.10.0
  2. Affected versionversion=1.10.1
  3. Affected versionversion=1.10.2
  4. Affected versionversion=1.11.0
  5. Affected versionversion=1.11.1
  6. Affected versionversion=1.12.0
  7. Affected versionversion=1.12.1
  8. Affected versionversion=1.12.2
  9. Affected versionversion=1.12.3
  10. Affected versionversion=1.12.4
  11. Affected versionversion=1.12.5
  12. Affected versionversion=1.12.6
  13. Affected versionversion=1.12.7
  14. Affected versionversion=1.13.0
  15. Affected versionversion=1.13.1
  16. Affected versionversion=1.13.2
  17. Affected versionversion=1.14.0
  18. Affected versionversion=1.14.1
  19. Affected versionversion=1.15.2
  20. Affected versionversion=1.15.3
  21. Affected versionversion=1.15.4
  22. Affected versionversion=1.15.6
  23. Affected versionversion=1.16.0
  24. Affected versionversion=1.16.1
  25. Affected versionversion=1.16.2
  26. Affected versionversion=1.16.3
  27. Affected versionversion=1.17.0
  28. Affected versionversion=1.18.1
  29. Affected versionversion=1.21.0
  30. Affected versionversion=1.21.2
  31. Affected versionversion=1.22.4
  32. Affected versionversion=1.24.1
  33. Affected versionversion=1.24.2
  34. Affected versionversion=1.24.4
  35. Affected versionversion=1.6.0
  36. Affected versionversion=1.7.0
  37. Affected versionversion=1.8.0
  38. Affected versionversion=1.8.1
  39. Affected versionversion=1.8.4
  40. Affected versionversion=1.9.0
  41. Affected versionversion=1.9.1
  42. Affected versionversion=6.0.7
  43. Affected versionversion=6.0.9
  44. Affected versionversion=6.1.5
  45. Affected versionversion=6.1.7
  46. Affected versionversion=6.1.9
  47. Affected versionversion=6.2.1
  48. Affected versionversion=6.2.19
  49. Affected versionversion=6.2.3
  50. Affected versionversion=6.2.5
  51. Affected versionversion=6.2.9
  52. Affected versionversion=6.3.1
  53. Affected versionversion=6.3.3
  54. Affected versionversion=6.3.5
  55. Affected versionversion=6.3.7
  56. Affected versionversion=7.0.5
  57. Affected versionversion=7.1.1
  58. Affected versionversion=7.1.5
  59. Affected versionversion=7.2.11
  60. Affected versionversion=7.2.13
  61. Affected versionversion=7.2.3
  62. Affected versionversion=7.2.5
  63. Affected versionversion=7.2.7
  64. Affected versionversion=7.3.1
  65. Affected versionversion=7.3.3
  66. Affected versionversion=7.3.5
  67. Affected versionversion=7.3.9
  68. Affected versionversion=8.1.3
  69. Affected versionversion=8.1.3.21242
  70. Affected versionversion=8.1.5
  71. Affected versionversion=8.1.5.21322
  72. Affected versionversion=8.1.7
  73. Affected versionversion=8.1.7.21417
  74. Affected versionversion=8.1.7.21512

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Secure Endpointversion=1.10.0; version=1.10.1; version=1.10.2; version=1.11.0; version=1.11.1; version=1.12.0; version=1.12.1; version=1.12.2; version=1.12.3; version=1.12.4; version=1.12.5; version=1.12.6; version=1.12.7; version=1.13.0; version=1.13.1; version=1.13.2; version=1.14.0; version=1.14.1; version=1.15.2; version=1.15.3; version=1.15.4; version=1.15.6; version=1.16.0; version=1.16.1; version=1.16.2; version=1.16.3; version=1.17.0; version=1.18.1; version=1.21.0; version=1.21.2; version=1.22.4; version=1.24.1; version=1.24.2; version=1.24.4; version=1.6.0; version=1.7.0; version=1.8.0; version=1.8.1; version=1.8.4; version=1.9.0; version=1.9.1; version=6.0.7; version=6.0.9; version=6.1.5; version=6.1.7; version=6.1.9; version=6.2.1; version=6.2.19; version=6.2.3; version=6.2.5; version=6.2.9; version=6.3.1; version=6.3.3; version=6.3.5; version=6.3.7; version=7.0.5; version=7.1.1; version=7.1.5; version=7.2.11; version=7.2.13; version=7.2.3; version=7.2.5; version=7.2.7; version=7.3.1; version=7.3.3; version=7.3.5; version=7.3.9; version=8.1.3; version=8.1.3.21242; version=8.1.5; version=8.1.5.21322; version=8.1.7; version=8.1.7.21417; version=8.1.7.21512

Published CVSS scores

5.3CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/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-125Out-of-bounds Read
T1499.004Application or System Exploitation

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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