CVE-2026-3091 | BDVDB-2026-317079 Detail

SynologySynology Presto Client

Description#

An uncontrolled search path element vulnerability in Synology Presto Client before 2.1.3-0672 allows local users to read or write arbitrary files and conduct denial-of-service during installation by placing a malicious DLL in advance in the same directory as the installer.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: local.

Weaknesses#

CWE-427 Uncontrolled Search Path Element

References#

https://www.synology.com/en-global/security/advisory/Synology_SA_26_02

Exploit#

No public exploit known

History#

Version 12026-02-24Record published in the CVE List.
Version 22026-06-02Most recent update recorded in the CVE List.

Published

Published: 2026-02-24
Last modified: 2026-06-02

Vendor information

Vendor: Synology
Product: Synology Presto Client

All Synology vulnerabilities

Score

6.7 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 5.7.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 2.1.3-0672
Fixed
2.1.3-0672

Scoring System

CVSS v4.0

Not available

CVSS v3.1

6.7 Medium

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Local
Attack Complexity	High
Privileges Required	Low
User Interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).