No exploitation reported

CVE-2017-11156

No exploitation reported by the sources we read.

Published2017-08-14
WeaknessCWE-276 · CWE-732

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2017-08-1419:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-11156?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-11156?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Synology download station

Branch	Affected	Fixed in	Source
3.2	= 3.2-2295	no fix published	NVD
3.3	= 3.3-2382	no fix published	NVD
3.3	= 3.3-2383	no fix published	NVD
3.3	= 3.3-2386	no fix published	NVD
3.4	= 3.4-2477	no fix published	NVD
3.4	= 3.4-2478	no fix published	NVD
3.4	= 3.4-2480	no fix published	NVD
3.4	= 3.4-2485	no fix published	NVD
3.4	= 3.4-2486	no fix published	NVD
3.4	= 3.4-2489	no fix published	NVD
3.4	= 3.4-2490	no fix published	NVD
3.4	= 3.4-2514	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

www.synology.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.07.8read 2026-10-23
NVDCVSS 2.06.5read 2026-10-23
CNAweakness (CWE)CWE-276read 2026-10-23
NVDweakness (CWE)CWE-732read 2026-10-23
FIRST EPSSEPSS score2.3 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2017-08-14
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-11156?

Is CVE-2017-11156 actively exploited?

Active exploitation of CVE-2017-11156 has not been confirmed. Its EPSS score was 2.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-11156?

CVE-2017-11156 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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