CVE-2017-9978: Osnexus Quantastor

Medium severity, CVSS 5.3. EPSS: 4.7% chance of exploitation in the next 30 days.

On the OSNEXUS QuantaStor v4 virtual appliance before 4.3.1, a flaw was found with the error message sent as a response for users that don't exist on the system. An attacker could leverage this information to fine-tune and enumerate valid accounts on the system by searching for common usernames.

Affected products

• Osnexus Quantastor: up to and including 4.3.0

Published 2017-08-28. Last modified 2026-06-17.