CVE & CISA-KEV Catalog

CVE-2017-11156

HIGHEPSS 80th pctl
7.8
CVSS v3
NVD

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.

CWE-276CWE-732Incorrect Permission Assignment for Critical Resource

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.21%probability of exploitation in 30 days
80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Vendor Advisory1
Embed a live status badge for CVE-2017-11156
CVE-2017-11156 severity badge

Markdown

[![CVE-2017-11156](https://tridentstack.com/cve/badge/CVE-2017-11156.svg)](https://tridentstack.com/cve/CVE-2017-11156)

HTML

<a href="https://tridentstack.com/cve/CVE-2017-11156"><img src="https://tridentstack.com/cve/badge/CVE-2017-11156.svg" alt="CVE-2017-11156"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.