CVE-2026-56415: Stonefly Storage Concentrator

Critical severity, CVSS 10.0. EPSS: 4.4% chance of exploitation in the next 30 days.

Storage Concentrator (SC & SCVM) contains a command injection vulnerability within the debug.pl script that is reachable without authentication. A remote attacker can submit a specially crafted HTTP request containing a malicious payload that is processed without adequate input sanitization, resulting in arbitrary command execution with root-level privileges on the underlying system.

Affected products

• Stonefly Storage Concentrator: before 8.0.4.22 (fixed in 8.0.4.22)
• Stonefly Storage Concentrator Virtual Machine: before 8.0.4.22 (fixed in 8.0.4.22)

Published 2026-06-30. Last modified 2026-07-01.