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CVE-2026-76142 – Unauthenticated Access Control Bypass on Internal IPC Endpoint – Genian NAC / ZTNA

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Summary

CVE-2026-76142 is a critical improper access control vulnerability in the internal-only IPC SOAP endpoint of the Genian NAC and Genian ZTNA policy server. Insufficient authentication on this interface allows an unauthenticated, network-based attacker to invoke internal server functions without any user interaction. The flaw carries a CVSS v4.0 base score of 9.3 (Critical), reflecting high impact to integrity and availability.

Technical details

  • Root cause: the policy server exposes an internal-only IPC SOAP endpoint that lacks sufficient authentication and access control checks (CWE-284 Improper Access Control, CWE-306 Missing Authentication for Critical Function).
  • Trigger condition: the endpoint, intended only for internal/trusted communication, can be reached and invoked externally without credentials.
  • Attack vector: network-based, no privileges and no user interaction required (CAPEC-115, authentication bypass).
  • Impact: an attacker can invoke internal server functions directly, resulting in high integrity and availability impact to the policy server, and low confidentiality impact.

Affected software

  • Genian NAC 5.0.75 LTS Release — Revisions 135823 up to (but not including) 148667
  • Genian NAC 5.0.85 Release Stable — Revisions 147181 up to (but not including) 148666
  • Genian NAC 5.0.86 Release — Revisions 148018 up to (but not including) 148665
  • Genian ZTNA 6.0.35 LTS Release — Revisions 135814 up to (but not including) 148672
  • Genian ZTNA 6.0.45 Release Stable — Revisions 147169 up to (but not including) 148671
  • Genian ZTNA 6.0.46 Release — Revisions 148028 up to (but not including) 148670

Severity

  • CVSS v4.0 Base Score: 9.3 (Critical)
  • Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H

Mitigation and recommended actions

  • Immediate: Update to the patched revision for your deployed edition:
    • Genian NAC 5.0.75 LTS → Revision 148667 or later
    • Genian NAC 5.0.85 Stable → Revision 148666 or later
    • Genian NAC 5.0.86 → Revision 148665 or later
    • Genian ZTNA 6.0.35 LTS → Revision 148672 or later
    • Genian ZTNA 6.0.45 Stable → Revision 148671 or later
    • Genian ZTNA 6.0.46 → Revision 148670 or later
  • If immediate patching is not possible: the vendor advisory states no temporary workaround is available, so restrict external/internet exposure of the policy server’s internal IPC interface through network segmentation or firewall rules until the patch can be applied.

References

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