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CVE-2026-3517 is an OS command injection vulnerability in the API of Progress Kemp LoadMaster and related ADC products. The flaw is in the addcountry functionality, where the customLocation parameter is not properly sanitized or validated before being incorporated into an operating system command. An authenticated attacker with Geo Administration permissions can supply crafted input that reaches a system call, resulting in arbitrary command execution on the LoadMaster appliance. The issue is a command injection condition in an administrative API path and can be used to achieve remote code execution in the context of the appliance.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An authenticated command injection vulnerability in LoadMaster's addcountry command endpoint requiring Geo Administration permissions, referenced as part of the April 2026 vulnerability cluster.
A MOVEit WAF vulnerability mentioned only as background on Progress Software's security history.
An OS command injection vulnerability that can lead to remote code execution by authenticated attackers in affected Progress products.
An OS command injection vulnerability in the API of Progress ADC Products that allows an authenticated attacker with Geo Administration permissions to execute arbitrary commands on a LoadMaster appliance via unsanitized input in the 'addcountry' command.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.