# CVE-2026-81584: Synology DiskStation Manager SQL injection in User API

Source: https://junglewise.ai/threats/cve-2026-81584-an-improper-neutralization-of-special-elements-used-in-an-sql  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-12. Updated: 2026-11-12  
License: CC BY 4.0 with a link back

CVE-2026-81584 · Severity: high · CVSS 8.1 · Published 2026-11-12

Synology DiskStation Manager is a network-attached storage operating system that manages file storage and sharing. An attacker who controls a compromised LDAP or Active Directory server can exploit a SQL injection vulnerability to read sensitive files, modify system data, or disrupt service. This requires the DSM to be configured to authenticate users against that server.

Technologies: [Synology DiskStation Manager](https://junglewise.ai/threats/technologies/diskstation-manager). Vendors: [Synology](https://junglewise.ai/threats/vendors/synology).

## Quick answers

**Is CVE-2026-81584 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81584 being exploited in the wild.

**How severe is CVE-2026-81584?** High severity, with a CVSS score of 8.1, published 12 November 2026.

**Which products and versions are affected?** Synology DiskStation Manager before 7.3.2-86009-5 and before 7.4.1-90080-1.

**Is there a fix for CVE-2026-81584?** Yes: fixed in DSM 7.3.2-86009-5, 7.4.1-90080-1 or above. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-81584 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-81584?** Check whether you run Synology DiskStation Manager at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in DSM 7.3.2-86009-5, 7.4.1-90080-1 or above

## Technical details

An improper neutralization of special elements in SQL commands (CWE-89) in the User API allows an attacker controlling a compromised LDAP or Active Directory server to inject SQL queries. The attack requires the DSM to authenticate users via the compromised directory server, but no direct authentication to DSM itself. Successful exploitation enables arbitrary file read/write and denial-of-service.

## Affected products

- Synology DiskStation Manager before 7.3.2-86009-5 and before 7.4.1-90080-1

## Timeline

- 2026-11-10: disclosed
- 2026-11-12: advisory

## References

- [https://www.synology.com/en-global/security/advisory/Synology_SA_26_18](https://www.synology.com/en-global/security/advisory/Synology_SA_26_18)

## Related threats

- [Synology DiskStation Manager sensitive information disclosure in API framework](https://junglewise.ai/threats/cve-2026-87801-an-insertion-of-sensitive-information-into-sent-data)
- [Synology DiskStation Manager SNMP API CRLF injection](https://junglewise.ai/threats/cve-2026-86343-an-improper-neutralization-of-crlf-sequences-vulnerability-in-the)
- [Synology DiskStation Manager authentication bypass in rsync](https://junglewise.ai/threats/cve-2026-85101-an-authentication-bypass-using-an-alternate-path-or-channel)
- [Synology DiskStation Manager reachable assertion denial-of-service](https://junglewise.ai/threats/cve-2026-85098-a-reachable-assertion-vulnerability-in-the-synoscgi-in-synology)
- [Synology DiskStation Manager TaskScheduler API missing authorization](https://junglewise.ai/threats/cve-2026-81559-a-missing-authorization-vulnerability-in-the-taskscheduler-api-in)