Progress Software Kemp LoadMaster enablexroot Use of Hard-Coded Cryptographic Key Privilege Escalation Vulnerability

July 29th, 2026
ZDI-26-482 ZDI-CAN-30687

CVE ID

CVE-2026-59689

CVSS Score

8.8 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Progress Software

Affected Products

Kemp LoadMaster

Vulnerability Details

This vulnerability allows remote attackers to escalate privileges on affected installations of Progress Software Kemp LoadMaster. Authentication is required to exploit this vulnerability.

The specific flaw exists within the enablexroot API endpoint. The issue results from the use of a hard-coded cryptographic key. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.

Additional Details

Progress Software has issued an update to correct this vulnerability. More details can be found at:
https://community.progress.com/s/article/LoadMaster-Critical-Security-Bulletin-July-2026-CVE-2026-59686-CVE-2026-59687-CVE-2026-59688-CVE-2026-59689-CVE-2026-59690

Disclosure Timeline

  • 2026-06-02 - Vulnerability reported to vendor
  • 2026-07-29 - Coordinated public release of advisory
  • 2026-07-29 - Advisory Updated

Credit

Xander Mackenzie | @thetrueartist.co.uk

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