# CVE-2026-56415 — Stonefly Storage Concentrator

> As of 2026-07-01, CVE-2026-56415 is a CRITICAL-severity vulnerability in Stonefly Storage Concentrator, CVSS v3.1 10, EPSS 3.0% (86.0th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-56415 as of 2026-07-01; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-01

## What is 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.

The record classifies CVE-2026-56415 under weakness class [CWE-78](https://cwe.mitre.org/data/definitions/78.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 80 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 10 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **CVSS v4.0 base score:** 10 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L`)
- **EPSS (FIRST):** 3.0% probability of exploitation in the next 30 days, higher than 86.0% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 8.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-06-30, last modified 2026-07-01

## Is CVE-2026-56415 being exploited?

It currently carries a trending score of 51 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **Stonefly**: Storage Concentrator, Storage Concentrator Virtual Machine

## How to fix CVE-2026-56415

No vendor patch reference has been recorded for CVE-2026-56415 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-56415

No threat campaign in the Threadlinqs corpus currently references CVE-2026-56415, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-07-02. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [cisa.gov](https://www.cisa.gov/news-events/ics-advisories/icsa-26-181-06)
- [github.com](https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-181-06.json)
- [stonefly.com](https://stonefly.com/contact-us/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-56415
Full detection coverage and IOCs for threats exploiting CVE-2026-56415 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp