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CVE-2026-16520 – Unauthenticated Admin Credential Disclosure via SQL Injection – Genian NAC/ZTNA (mu

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Summary

CVE-2026-16520 is a high-severity vulnerability in Genians’ Genian NAC (V4.0 and V5.0) and Genian ZTNA (V6.0) products, caused by improper input validation and exposure of sensitive information through data queries in the Client Web Portal (CWP) user search feature. The flaw permits SQL injection and authentication bypass, allowing an unauthenticated network attacker to retrieve administrator credentials. It carries a CVSS score of 8.7 (High).

Technical details

  • Root cause: the CWP user search functionality fails to properly validate/authenticate input before executing backend data queries, enabling SQL injection.
  • The same weakness allows exposure of sensitive information (including administrator credentials) through crafted queries, resulting in authentication bypass.
  • Attack vector: Network — exploitable remotely, no privileges or user interaction required (AV:N/AC:L/AT:N/PR:N/UI:N).
  • Impact: high confidentiality loss (VC:H) — disclosure of sensitive/credential data via the exposed search feature; no direct integrity or availability impact reported.
  • Mapped weaknesses: CWE-20 (Improper Input Validation) and CWE-202 (Exposure of Sensitive Information Through Data Queries).

Affected software

  • Genian NAC V4.0: from 4.0.0 before 4.0.175 (Revision 150340)
  • Genian NAC V5.0: from 5.0.0 before 5.0.65 LTS (Revision 150331)
  • Genian NAC V5.0: from 5.0.0 before 5.0.75 LTS (Revision 150330)
  • Genian NAC V5.0: from 5.0.0 before 5.0.87 Release Stable (Revision 150329)
  • Genian NAC V5.0: from 5.0.0 before 5.0.88 (Revision 150328)
  • Genian ZTNA V6.0: from 6.0.0 before 6.0.26 LTS (Revision 150337)
  • Genian ZTNA V6.0: from 6.0.0 before 6.0.35 LTS (Revision 150336)
  • Genian ZTNA V6.0: from 6.0.0 before 6.0.47 Release Stable (Revision 150334)
  • Genian ZTNA V6.0: from 6.0.0 before 6.0.48 (Revision 150333)

Severity

CVSS v4.0 Base Score: 8.7 (High)
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
(No CVSS v3.1 vector has been published for this CVE by the assigning CNA.)

Mitigation and recommended actions

  • Immediate: Upgrade Genian NAC / Genian ZTNA to the fixed revisions listed above (the first revision equal to or greater than the stated thresholds for each branch).
  • If patching cannot be performed immediately: restrict or disable access to the CWP user search feature in environments where it is not required, per the vendor’s guidance; contact Genians technical support for implementation details.
  • Review administrator accounts for signs of compromise if the CWP user search feature was internet-exposed prior to patching.

References

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