What’s Vulnerable › Vulnerabilities

CVE-2017-11156

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-08-14 · updated 2026-06-17
• Weakness: CWE-276

Description

Synology Download Station 3.8.x before 3.8.5-3475 and 3.x before 3.5-2984 uses weak permissions (0777) for ui/dlm/btsearch directory, which allows remote authenticated users to execute arbitrary code by uploading an executable via unspecified vectors.

Affected products

• Synology Download Station: 3.2-2295, 3.3-2382, 3.3-2383, 3.3-2386, 3.4-2477, 3.4-2478 (+27)

References

• https://www.synology.com/en-global/support/security/Synology_SA_17_28_Download_Station
• https://www.synology.com/en-global/support/security/Synology_SA_17_28_Download_Station

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