CVE-2021-31859: Ysoft Safeq

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Incorrect privileges in the MU55 FlexiSpooler service in YSoft SafeQ 6 6.0.55 allows local user privilege escalation by overwriting the executable file via an alternative data stream.

Affected products

• Ysoft Safeq: version 6.0.55 only

Published 2021-07-14. Last modified 2026-06-17.