CVE-2026-13666: Improper Neutralization of CRLF Sequences ('CRLF Injection') in Synology DiskStation Manager (DSM)
An improper neutralization of CRLF sequences ('CRLF Injection') vulnerability in Sharing API 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 authenticated users to write limited files when a victim clicks a sharing URL.
AI Analysis
Technical Summary
This vulnerability involves improper neutralization of CRLF sequences in the Sharing API of Synology DSM, enabling remote authenticated users to perform limited file write operations triggered by a victim clicking a malicious sharing URL. The issue affects multiple DSM versions prior to the specified fixed builds. The CVSS 3.1 base score is 3.5, indicating low severity, with attack vector network, low attack complexity, requiring privileges and user interaction, and impacts integrity only without confidentiality or availability impact.
Potential Impact
An attacker with valid authentication can cause limited file writes on the system when a victim interacts with a crafted sharing URL. This may allow limited integrity modifications but does not affect confidentiality or availability. There are no known exploits in the wild.
Mitigation Recommendations
Fixed versions are 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. Patch status is confirmed by version numbers; no additional mitigation guidance is provided.
CVE-2026-13666: Improper Neutralization of CRLF Sequences ('CRLF Injection') in Synology DiskStation Manager (DSM)
Description
An improper neutralization of CRLF sequences ('CRLF Injection') vulnerability in Sharing API 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 authenticated users to write limited files when a victim clicks a sharing URL.
CVSS v3.1
Score 3.5low
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 involves improper neutralization of CRLF sequences in the Sharing API of Synology DSM, enabling remote authenticated users to perform limited file write operations triggered by a victim clicking a malicious sharing URL. The issue affects multiple DSM versions prior to the specified fixed builds. The CVSS 3.1 base score is 3.5, indicating low severity, with attack vector network, low attack complexity, requiring privileges and user interaction, and impacts integrity only without confidentiality or availability impact.
Potential Impact
An attacker with valid authentication can cause limited file writes on the system when a victim interacts with a crafted sharing URL. This may allow limited integrity modifications but does not affect confidentiality or availability. There are no known exploits in the wild.
Mitigation Recommendations
Fixed versions are 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. Patch status is confirmed by version numbers; no additional mitigation guidance is provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- synology
- Date Reserved
- 2026-06-29T10:30:40.284Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aad91cb55bf5e2cf5719195
Added to database: 09/18/2026, 19:32:27 UTC
Last enriched: 09/18/2026, 19:47:27 UTC
Last updated: 09/18/2026, 22:36:29 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.