CVE-2026-55721

CRITICAL 9.3

SQL Injection in StoneFly Storage Concentrator

CVSS Score

9.3

EPSS Score

0.0%

EPSS Percentile

0th

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 an unauthenticated remote attacker to manipulate those queries and extract sensitive information from the underlying database, including session tokens, password hashes, and stored secret keys.

CWE	CWE-89
Vendor	stonefly
Product	storage concentrator
Published	Jun 30, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

None

Affected Versions

StoneFly / Storage Concentrator

0 < 8.0.4.22

StoneFly / Storage Concentrator Virtual Machine

0 < 8.0.4.22

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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/

Credits

🔍 David Yesland of Rhino Security Labs reported this vulnerability to CISA.