CVE-2026-3091 PUBLISHED

Assigner: synology
Reserved: 24.02.2026 Published: 24.02.2026 Updated: 24.02.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS Score: 6.7

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

CVSS 3.1

Product Status

Vendor	Synology
Product	Synology Presto Client
Versions	Default: affected affected from * to 2.1.3-0672 (excl.)

Credits

Sahil Shah finder

References

Synology-SA-26:02 Synology Presto Client

Problem Types

Uncontrolled Search Path Element CWE