CVE-2024-20531Network attack vector

File disclosure and SSRF via XML entity expansion

Published Nov 6, 2024 · Updated Nov 6, 2024

XXE in Cisco Identity Services Engine 3.4.0 and earlier allows remote authenticated users to read files or trigger server-side requests. The ISE API parser resolves crafted XML external entity entries instead of rejecting them, exposing local file contents and issuing requests from the appliance. Valid Super Admin credentials are required, and the resulting access is limited to file reads and SSRF through the affected device.

CVSS severity5.5
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in Cisco Identity Services Engine 3.4.0 and earlier allows remote authenticated users to read files or trigger server-side requests. The ISE API parser resolves crafted XML external entity entries instead of rejecting them, exposing local file contents and issuing requests from the appliance. Valid Super Admin credentials are required, and the resulting access is limited to file reads and SSRF through the affected device.

The record

CVE
CVE-2024-20531
Published
Nov 6, 2024
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco Identity Services Engine
Classifications
CWE-611, T1210
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 2024Record 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=3.0.0
  2. Affected versionversion=3.0.0 p1
  3. Affected versionversion=3.0.0 p2
  4. Affected versionversion=3.0.0 p3
  5. Affected versionversion=3.0.0 p4
  6. Affected versionversion=3.0.0 p5
  7. Affected versionversion=3.0.0 p6
  8. Affected versionversion=3.0.0 p7
  9. Affected versionversion=3.0.0 p8
  10. Affected versionversion=3.1.0
  11. Affected versionversion=3.1.0 p1
  12. Affected versionversion=3.1.0 p2
  13. Affected versionversion=3.1.0 p3
  14. Affected versionversion=3.1.0 p4
  15. Affected versionversion=3.1.0 p5
  16. Affected versionversion=3.1.0 p6
  17. Affected versionversion=3.1.0 p7
  18. Affected versionversion=3.1.0 p8
  19. Affected versionversion=3.1.0 p9
  20. Affected versionversion=3.2.0
  21. Affected versionversion=3.2.0 p1
  22. Affected versionversion=3.2.0 p2
  23. Affected versionversion=3.2.0 p3
  24. Affected versionversion=3.2.0 p4
  25. Affected versionversion=3.2.0 p5
  26. Affected versionversion=3.2.0 p6
  27. Affected versionversion=3.3.0
  28. Affected versionversion=3.3 Patch 1
  29. Affected versionversion=3.3 Patch 2
  30. Affected versionversion=3.3 Patch 3
  31. Affected versionversion=3.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ClamAV · Cisco Identity Services Engineversion=3.0.0; version=3.0.0 p1; version=3.0.0 p2; version=3.0.0 p3; version=3.0.0 p4; version=3.0.0 p5; version=3.0.0 p6; version=3.0.0 p7; version=3.0.0 p8; version=3.1.0; version=3.1.0 p1; version=3.1.0 p2; version=3.1.0 p3; version=3.1.0 p4; version=3.1.0 p5; version=3.1.0 p6; version=3.1.0 p7; version=3.1.0 p8; version=3.1.0 p9; version=3.2.0; version=3.2.0 p1; version=3.2.0 p2; version=3.2.0 p3; version=3.2.0 p4; version=3.2.0 p5; version=3.2.0 p6; version=3.3.0; version=3.3 Patch 1; version=3.3 Patch 2; version=3.3 Patch 3; version=3.4.0

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
5.5Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1210Exploitation of Remote Services

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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