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Fencer Vulns
critical 10.0

CVE-2026-56415 json

OS Command Injection in StoneFly Storage Concentrator

published 2026-06-30 4 mo ago modified 2026-07-01 4 mo ago also EUVD-2026-40844

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
4.4%
EPSS 4.4% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

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.

Patch / fix

  • Stonefly Storage Concentrator 8.0.4.22, 8.0.4.29
  • Stonefly Storage Concentrator Virtual Machine 8.0.4.22, 8.0.4.29

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-181-06 updated cvss 10.0

StoneFly Storage Concentrator

  • StoneFly Storage Concentrator <8.0.4.22
    affected: vendor fix, mitigation “For additional questions or support, users may contact StoneFly at https://stonefly.com/contact-us/.” stonefly.com
  • StoneFly Storage Concentrator Virtual Machine <8.0.4.22
    affected: mitigation “For additional questions or support, users may contact StoneFly at https://stonefly.com/contact-us/.” stonefly.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
4 mo ago

Exploit prediction

4.36% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 10.0 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
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA 4.0 10.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Stonefly Storage Concentrator
  • Stonefly Storage Concentrator Virtual Machine

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.