What is CVE-2021-34809?

CVE-2021-34809 is a critical-severity vulnerability in Synology Download Station, classified under Command Injection. CVSS score: 9.9/10. Published 2021-06-18.

How severe is CVE-2021-34809?

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

RCE in Synology Download Station

CVE-2021-34809

Improper neutralization of special elements used in a command ('Command Injection') vulnerability in task management component in Synology Download Station before 3.8.16-3566 allows remote authenticated users to execute arbitrary code via unspecified vectors.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.019 (78.0th 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 Download Station — versions unspecified
Synology Download_station

Weakness classification (CWE)

CWE-77 — Command Injection

References

security@synology.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-34809?: CVE-2021-34809 is a critical-severity vulnerability in Synology Download Station, classified under Command Injection. CVSS score: 9.9/10. Published 2021-06-18.
How severe is CVE-2021-34809?: Critical severity. CVSS v3 base score is 9.9 out of 10.