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MEDIUM · 6.7

CVE-2026-3091

An uncontrolled search path element vulnerability in Synology Presto Client before 2.1.3-0672 allows local users to read or write arbitrary files during installation by placing a malicious DLL in adva...

Vulnerability 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 during installation by placing a malicious DLL in advance in the same directory as the installer.

CVSS Score

6.7

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
SynologyPresto Client< 2.1.3-0672

Related Weaknesses (CWE)

CWE-427

References

FAQ

What is CVE-2026-3091?

CVE-2026-3091 is a vulnerability with a CVSS score of 6.7 (MEDIUM). An uncontrolled search path element vulnerability in Synology Presto Client before 2.1.3-0672 allows local users to read or write arbitrary files during installation by placing a malicious DLL in adva...

How severe is CVE-2026-3091?

CVE-2026-3091 has been rated MEDIUM with a CVSS base score of 6.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-3091?

Check the references section above for vendor advisories and patch information. Affected products include: Synology Presto Client.