CVE-2021-43928

8.8 highEPSS 1.9%

High (8.8) in synology mail station. 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.

Severity

CVSS 3.1

8.8 high

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

EPSS: 1.9% chance of exploitation in the next 30 days; higher than 79% of CVEs (scores of 2026-10-31)
CWE: CWE-78
Published: 2022-02-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

synology:mail_station

References

https://www.synology.com/security/advisory/Synology_SA_21_28
https://www.synology.com/security/advisory/Synology_SA_21_28

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