CVE-2026-3518 is an authenticated OS command injection vulnerability in the API of Progress ADC products, including Progress Kemp LoadMaster. The flaw is present in the ssodomain_killsession or killsession functionality, where unsanitized user-controlled input, specifically the key parameter, is improperly validated before being incorporated into an operating system command or system call. An attacker with valid access and the required permission level can supply crafted input that breaks intended command boundaries and causes arbitrary command execution on the LoadMaster appliance.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
13 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 killsession command endpoint, 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 'All' permissions to execute arbitrary commands on a LoadMaster appliance via unsanitized input in the 'killsession' 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.