What is CVE-2021-43928?

CVE-2021-43928 is a critical-severity vulnerability in Synology Mail Station, classified under OS Command Injection. CVSS score: 9.9/10. Published 2022-02-07.

How severe is CVE-2021-43928?

Critical severity. CVSS v3 base score is 9.9 out of 10.

RCE in Synology Mail Station

CVE-2021-43928

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.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.019 (77.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Synology Mail Station — versions unspecified
Synology Mail_station

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security@synology.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-43928?: CVE-2021-43928 is a critical-severity vulnerability in Synology Mail Station, classified under OS Command Injection. CVSS score: 9.9/10. Published 2022-02-07.
How severe is CVE-2021-43928?: Critical severity. CVSS v3 base score is 9.9 out of 10.