Unauthenticated SQL Injection in Osnexus Quantastor

published 2026-06-04 5 mo ago modified 2026-07-22 3 mo ago also EUVD-2026-34305

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits: 0; none known

OSNexus QuantaStor SDS Manager is vulnerable to SQL injection in the login endpoint. The username field is not properly sanitized before being incorporated into a SQL query, allowing an unauthenticated remote attacker to bypass authentication and log in as an administrator without supplying a valid password.

Patch / fix

fixed in 1

Osnexus QuantaStor 6.6.1

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 5 mo ago (2026-06-04)

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Osnexus QuantaStor

Classification

Weakness

CWE-89 Improper Neutralization of Special Elements used in an SQL Command

References

blog.blacklanternsecurity.com /p/cve-2026-10880-osnexus-quantastor

Sources

CVE List CVE-2026-10880
NVD CVE-2026-10880

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.

Summary