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CVE-2026-75896 – Hard-coded LDAP Credentials Enabling Authentication Bypass – TÜBİTAK BİLGEM Liderah

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Summary

CVE-2026-75896 is a critical vulnerability (CWE-798: Use of Hard-coded Credentials) affecting Liderahenk, a centralized management platform developed by TÜBİTAK BİLGEM Software Technologies Research Institute. The software embeds fixed LDAP authentication credentials within its codebase, allowing an unauthenticated network attacker to leverage these predetermined values to bypass access controls. The issue carries a CVSS v3.1 base score of 9.1 (Critical).

Technical details

  • Root cause: Liderahenk contains hard-coded/embedded credentials used for LDAP connections rather than relying on unique, securely managed authentication secrets.
  • Trigger conditions: An attacker who discovers or extracts the embedded LDAP credentials (e.g., via reverse engineering the application, configuration files, or common/default credential guessing per CAPEC-70) can use them directly against the LDAP service the application relies on.
  • Attack vector: Network-based (AV:N) — no local access, special privileges, or user interaction is required to exploit the flaw.
  • Impact: Successful exploitation results in high confidentiality and integrity impact, potentially allowing unauthorized access to LDAP-backed directory data and the ability to modify directory information without holding legitimate credentials. Availability impact is not affected.

Affected software

  • Liderahenk — all versions prior to 3.5.5

Severity

  • CVSS v3.1 Base Score: 9.1 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation and recommended actions

  • Immediate: Upgrade Liderahenk to version 3.5.5 or later, where the hard-coded LDAP credentials have been removed/remediated.
  • If immediate patching is not possible:
    • Rotate the LDAP account credentials used by Liderahenk and enforce unique, strong secrets that are not embedded in application code or distributed configuration.
    • Restrict network access to the LDAP service and the Liderahenk management components to trusted, segmented management networks only.
    • Monitor LDAP authentication logs for anomalous or unexpected bind attempts using service accounts associated with Liderahenk.
    • Review and audit any exposed configuration files, packages, or binaries for embedded credential strings and rotate any credentials found.

References

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