What is CVE-2026-55721?

CVE-2026-55721 is a critical-severity vulnerability in Stonefly Storage Concentrator, classified under SQL Injection. CVSS score: 9.3/10. Published 2026-06-30.

How severe is CVE-2026-55721?

Critical severity. CVSS v3 base score is 9.3 out of 10.

SQL Injection in Stonefly Storage Concentrator

CVE-2026-55721

Storage Concentrator (SC & SCVM) is vulnerable to SQL injection through cookie values processed by the login.pl and debug.pl scripts. The cookie value is incorporated directly into database queries without adequate sanitization, allowing a…

Vulnerability class: SQL Injection

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N.

Affected products

Stonefly Storage Concentrator — versions 0, 8.0.4.29
Stonefly Storage Concentrator Virtual Machine — versions 0, 8.0.4.29

Weakness classification (CWE)

CWE-89 — SQL Injection

References

ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov

Frequently asked questions

What is CVE-2026-55721?: CVE-2026-55721 is a critical-severity vulnerability in Stonefly Storage Concentrator, classified under SQL Injection. CVSS score: 9.3/10. Published 2026-06-30.
How severe is CVE-2026-55721?: Critical severity. CVSS v3 base score is 9.3 out of 10.