# CVE-2026-87801: Synology DiskStation Manager sensitive information disclosure in API framework

Source: https://junglewise.ai/threats/cve-2026-87801-an-insertion-of-sensitive-information-into-sent-data  
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-2026-87801 · Severity: medium · CVSS 6.5 · Published 2026-11-12

Synology DiskStation Manager is a network storage management system. A vulnerability in its API framework allows authenticated users to read sensitive information that should not be exposed, such as arbitrary files on the storage system. An attacker with valid credentials could gain unauthorized access to confidential data stored on the NAS device.

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

## Quick answers

**Is CVE-2026-87801 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-87801 being exploited in the wild.

**How severe is CVE-2026-87801?** Medium severity, with a CVSS score of 6.5, published 12 November 2026.

**Which products and versions are affected?** Synology DiskStation Manager 7.3.x before 7.3.2-86009-5; 7.4.x before 7.4.1-90080-1.

**Is there a fix for CVE-2026-87801?** 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-2026-87801 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-87801?** 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

The vulnerability is an insertion of sensitive information into sent data (CWE-201) in the DSM API framework affecting versions before 7.3.2-86009-5 and 7.4.1-90080-1. Remote authenticated users can read arbitrary files without proper authorization. The attack requires valid user credentials and network access to the DSM interface.

## Affected products

- Synology DiskStation Manager 7.3.x before 7.3.2-86009-5; 7.4.x 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)

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- [Synology DiskStation Manager TaskScheduler API missing authorization](https://junglewise.ai/threats/cve-2026-81559-a-missing-authorization-vulnerability-in-the-taskscheduler-api-in)