Advisory Details

May 21st, 2026

Progress Software Kemp LoadMaster addcountry Command Injection Remote Code Execution Vulnerability

CVE ID	CVE-2026-3517
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 execute arbitrary code on affected installations of Progress Software Kemp LoadMaster. Authentication is required to exploit this vulnerability. The specific flaw exists within handling of the customLocation parameter. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the appliance.
ADDITIONAL DETAILS	Progress Software has issued an update to correct this vulnerability. More details can be found at: https://docs.progress.com/bundle/release-notes_loadmaster-7-2-63-1/page/Security-Updates.html
DISCLOSURE TIMELINE	2026-02-23 - Vulnerability reported to vendor 2026-05-21 - Coordinated public release of advisory 2026-05-21 - Advisory Updated
CREDIT	Michael Argany of TrendAI Research

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