CVE-2021-43928: Synology Mail Station

High severity, CVSS 8.8. EPSS: 1.9% chance of exploitation in the next 30 days.

Improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability in mail sending and receiving component in Synology Mail Station before 20211105-10315 allows remote authenticated users to execute arbitrary commands via unspecified vectors.

Affected products

• Synology Mail Station: before 20211105 (fixed in 20211105)

Published 2022-02-07. Last modified 2026-06-17.