CVE-2026-9548
Quick assessment
Affected
Synology Synology Chat Server
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.
在 Synology Chat Server 2.4.5-22148 之前的版本中，存在一个在网页生成过程中输入处理不当（“跨站脚本”）的漏洞。通过用户界面交互，远程经身份验证的用户可以利用该漏洞读取或写入受限文件，并在 DSM 中发起有限的拒绝服务攻击。
Possible ATT&CK Techniques 1 AI
T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-9548
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in extract domain in Synology Chat Server before 2.4.5-22148 allows remote authenticated users, via a UI interaction, to read or write restricted files and conduct limited denial-of-service attacks in DSM.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Synology | Synology Chat Server | * ~ 2.4.5-22148 | - |
|
II. Public POCs for CVE-2026-9548
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-9548 (1)
-
🔗 Synology_SA_26_10 | Synology Inc. vendor-advisory
Same Patch Batch · Synology · 2026-08-28 · 3 CVEs total
| CVE-2026-40541 | 9.0 CRITICAL | Synology Chat Server 2.4.5 前跨站脚本漏洞 |
| CVE-2026-9491 | 4.3 MEDIUM | Synology Chat Server 2.4.5前Webhook存在SSRF漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-9548
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