RCE in Stonefly Storage Concentrator

CVE-2026-56415

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.

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.044 (90.9th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-56415: held from 0.044 to 0.044.

EPSS over last 30 days · oldest: 0.044 · newest: 0.044 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-56415?
CVE-2026-56415 is a critical-severity vulnerability in Stonefly Storage Concentrator, classified under OS Command Injection. CVSS score: 10.0/10. Published 2026-06-30.
How severe is CVE-2026-56415?
Critical severity. CVSS v3 base score is 10.0 out of 10.