CVE-2026-76427Network attack vector

Arbitrary file read via external entity resolution

Published Sep 16, 2026 · Updated Sep 18, 2026

XXE in the offline profiler feed service in Cisco ISE allows remote authenticated users to read arbitrary files through a crafted feed. The service parses attacker-controlled feed metadata with an XML parser that leaves external entity resolution enabled. Administrative credentials and access to the offline feed upload are required; exploitation exposes appliance files and can send requests to internal systems.

CVSS severity4.9
Medium
EPSS probability0.46%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in the offline profiler feed service in Cisco ISE allows remote authenticated users to read arbitrary files through a crafted feed. The service parses attacker-controlled feed metadata with an XML parser that leaves external entity resolution enabled. Administrative credentials and access to the offline feed upload are required; exploitation exposes appliance files and can send requests to internal systems.

The record

CVE
CVE-2026-76427
Published
Sep 16, 2026
Updated
Sep 18, 2026
Vendor
Clam AntiVirus
Product
Cisco Identity Services Engine
Classifications
CWE-611, T1005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=3.1.0
  2. Affected versionversion=3.1.0 p1
  3. Affected versionversion=3.1.0 p10
  4. Affected versionversion=3.1.0 p11
  5. Affected versionversion=3.1.0 p2
  6. Affected versionversion=3.1.0 p3
  7. Affected versionversion=3.1.0 p4
  8. Affected versionversion=3.1.0 p5
  9. Affected versionversion=3.1.0 p6
  10. Affected versionversion=3.1.0 p7
  11. Affected versionversion=3.1.0 p72
  12. Affected versionversion=3.1.0 p8
  13. Affected versionversion=3.1.0 p9
  14. Affected versionversion=3.2.0
  15. Affected versionversion=3.2.0 p1
  16. Affected versionversion=3.2.0 p2
  17. Affected versionversion=3.2.0 p3
  18. Affected versionversion=3.2.0 p4
  19. Affected versionversion=3.2.0 p5
  20. Affected versionversion=3.2.0 p6
  21. Affected versionversion=3.2.0 p7
  22. Affected versionversion=3.2 Patch 10
  23. Affected versionversion=3.2 Patch 8
  24. Affected versionversion=3.2 Patch 9
  25. Affected versionversion=3.3.0
  26. Affected versionversion=3.3 Patch 1
  27. Affected versionversion=3.3 Patch 10
  28. Affected versionversion=3.3 Patch 11
  29. Affected versionversion=3.3 Patch 12
  30. Affected versionversion=3.3 Patch 2
  31. Affected versionversion=3.3 Patch 3
  32. Affected versionversion=3.3 Patch 4
  33. Affected versionversion=3.3 Patch 5
  34. Affected versionversion=3.3 Patch 6
  35. Affected versionversion=3.3 Patch 7
  36. Affected versionversion=3.3 Patch 8
  37. Affected versionversion=3.3 Patch 9
  38. Affected versionversion=3.4.0
  39. Affected versionversion=3.4 Patch 1
  40. Affected versionversion=3.4 Patch 2
  41. Affected versionversion=3.4 Patch 3
  42. Affected versionversion=3.4 Patch 4
  43. Affected versionversion=3.4 Patch 5
  44. Affected versionversion=3.4 Patch 6
  45. Affected versionversion=3.5.0
  46. Affected versionversion=3.5 Patch 1
  47. Affected versionversion=3.5 Patch 2
  48. Affected versionversion=3.5 Patch 3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Clam AntiVirus · Cisco Identity Services Engineversion=3.1.0; version=3.1.0 p1; version=3.1.0 p10; version=3.1.0 p11; 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 p72; 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=3.2.0 p7; version=3.2 Patch 10; version=3.2 Patch 8; version=3.2 Patch 9; version=3.3.0; version=3.3 Patch 1; version=3.3 Patch 10; version=3.3 Patch 11; version=3.3 Patch 12; version=3.3 Patch 2; version=3.3 Patch 3; version=3.3 Patch 4; version=3.3 Patch 5; version=3.3 Patch 6; version=3.3 Patch 7; version=3.3 Patch 8; version=3.3 Patch 9; version=3.4.0; version=3.4 Patch 1; version=3.4 Patch 2; version=3.4 Patch 3; version=3.4 Patch 4; version=3.4 Patch 5; version=3.4 Patch 6; version=3.5.0; version=3.5 Patch 1; version=3.5 Patch 2; version=3.5 Patch 3
Clam AntiVirus · Cisco ISE Passive Identity Connectorversion=3.1.0; version=3.2.0; version=3.3.0; version=3.4.0; version=3.5.0

Published CVSS scores

4.9CiscoCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1005Data from Local System

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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