CVE-2021-33184

Severity: high (CVSS 7.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-01 · updated 2026-06-17
Weakness: CWE-918

Description

Server-Side request forgery (SSRF) vulnerability in task management component in Synology Download Station before 3.8.15-3563 allows remote authenticated users to read arbitrary files via unspecified vectors.

Affected products

Synology Download Station: before 3.8.15-3563 — fixed in 3.8.15-3563

How to fix

Upgrade to a fixed version: Synology Download Station 3.8.15-3563. Check the vendor advisory for mitigations.

References

https://www.synology.com/security/advisory/Synology_SA_20_23
https://www.synology.com/security/advisory/Synology_SA_20_23

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