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CVE-2026-3091

Quick assessment

Affected
Synology Synology Presto Client
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Synology Presto Client是中国群晖（Synology）公司的一个高速传输工具。 Synology Presto Client 2.1.3-0672之前版本存在代码问题漏洞，该漏洞源于安装过程中搜索路径元素未受控，可能导致本地用户在安装程序同目录放置恶意DLL来读写任意文件。

CVSS 6.7 · Medium EPSS 0.14% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
Synology Synology Presto Client *< 2.1.3-0672 affected
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I. Basic Information for CVE-2026-3091

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
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 and conduct denial-of-service during installation by placing a malicious DLL in advance in the same directory as the installer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对搜索路径元素未加控制
Source: CVE Program / CVE List V5
Vulnerability Title
Synology Presto Client 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Synology Presto Client是中国群晖（Synology）公司的一个高速传输工具。 Synology Presto Client 2.1.3-0672之前版本存在代码问题漏洞，该漏洞源于安装过程中搜索路径元素未受控，可能导致本地用户在安装程序同目录放置恶意DLL来读写任意文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Synology Synology Presto Client * ~ 2.1.3-0672 -

II. Public POCs for CVE-2026-3091

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III. Intelligence Information for CVE-2026-3091

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IV. Related Vulnerabilities

Same vendor: Synology
Same weakness: CWE-427

V. Comments for CVE-2026-3091

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