CVE-2026-13684: Improper Encoding or Escaping of Output in Synology DiskStation Manager (DSM)
An improper encoding or escaping of output vulnerability in SCGI in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote attackers to read or write arbitrary files and conduct denial-of-service attacks.
AI Analysis
Technical Summary
This vulnerability in Synology DSM's SCGI component arises from improper encoding or escaping of output, enabling remote attackers to read or write arbitrary files and cause denial-of-service conditions. The flaw affects multiple DSM versions prior to specific patch releases. The CVSS 3.1 score of 9.8 indicates a critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows remote attackers to read or write arbitrary files on the affected system and conduct denial-of-service attacks, potentially compromising system confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in Synology DiskStation Manager versions 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. Users should upgrade to these or later versions to remediate the vulnerability. No additional mitigation guidance is provided in the vendor advisory.
CVE-2026-13684: Improper Encoding or Escaping of Output in Synology DiskStation Manager (DSM)
Description
An improper encoding or escaping of output vulnerability in SCGI in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote attackers to read or write arbitrary files and conduct denial-of-service attacks.
CVSS v3.1
Score 9.8critical
Affected software
Synology
DiskStation Manager (DSM)
pkg:rpm/synology/diskstation-managerRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Synology DSM's SCGI component arises from improper encoding or escaping of output, enabling remote attackers to read or write arbitrary files and cause denial-of-service conditions. The flaw affects multiple DSM versions prior to specific patch releases. The CVSS 3.1 score of 9.8 indicates a critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows remote attackers to read or write arbitrary files on the affected system and conduct denial-of-service attacks, potentially compromising system confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in Synology DiskStation Manager versions 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. Users should upgrade to these or later versions to remediate the vulnerability. No additional mitigation guidance is provided in the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- synology
- Date Reserved
- 2026-06-29T10:42:15.926Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aad91cd55bf5e2cf5719199
Added to database: 09/18/2026, 19:32:29 UTC
Last enriched: 09/18/2026, 19:46:27 UTC
Last updated: 09/19/2026, 00:07:32 UTC
Views: 5
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