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CVE-2021-26566

Quick assessment

Affected
Synology Synology DiskStation Manager (DSM)
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 DiskStation Manager（DSM）是中国群晖科技（Synology）公司的一套用于网络储存服务器（NAS）上的操作系统。该操作系统可管理资料、文件、照片、音乐等信息。 Synology DiskStation Manager 6.2.3-25426-3 版本之前存在信息泄露漏洞，该漏洞源于发送数据漏洞中插入敏感信息，攻击者可利用该漏洞通过入站QuickConnect流量执行任意命令。

CVSS 8.3 · High EPSS 1.51% · P74

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-26566

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Insertion of sensitive information into sent data vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to execute arbitrary commands via inbound QuickConnect traffic.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过发送数据的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Synology DiskStation Manager 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Synology DiskStation Manager（DSM）是中国群晖科技（Synology）公司的一套用于网络储存服务器（NAS）上的操作系统。该操作系统可管理资料、文件、照片、音乐等信息。 Synology DiskStation Manager 6.2.3-25426-3 版本之前存在信息泄露漏洞，该漏洞源于发送数据漏洞中插入敏感信息，攻击者可利用该漏洞通过入站QuickConnect流量执行任意命令。
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 DiskStation Manager (DSM) unspecified ~ 6.2.3-25426-3 -

II. Public POCs for CVE-2021-26566

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III. Intelligence Information for CVE-2021-26566

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Other References for CVE-2021-26566 (2)

Same Patch Batch · Synology · 2021-02-26 · 7 CVEs total

CVE-2021-26562 9.0 CRITICAL Synology DiskStation Manager 缓冲区错误漏洞
CVE-2021-26561 9.0 CRITICAL Synology DiskStation Manager 缓冲区错误漏洞
CVE-2021-26560 9.0 CRITICAL Synology DiskStation Manager 安全漏洞
CVE-2021-26564 8.3 HIGH Synology DiskStation Manager 安全漏洞
CVE-2021-26565 8.3 HIGH Synology DiskStation Manager 安全漏洞
CVE-2021-26563 8.2 HIGH Synology DiskStation Manager 访问控制错误漏洞

IV. Related Vulnerabilities

Same product: Synology DiskStation Manager (DSM)
Same vendor: Synology
Same weakness: CWE-201

V. Comments for CVE-2021-26566

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