# CVE-2026-15198: Synology DiskStation Manager WebDAV missing authentication

Source: https://junglewise.ai/threats/cve-2026-15198-a-missing-authentication-for-critical-functionality-vulnerability  
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-2026-15198 · Severity: medium · CVSS 6.5 · Published 2026-11-12

Synology DiskStation Manager (DSM) is network-attached storage software used in enterprise and SMB environments. A flaw in the WebDAV API allows unauthenticated remote attackers to read files and trigger limited denial-of-service attacks without any credentials. This could expose sensitive data stored on the system.

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

## Quick answers

**Is CVE-2026-15198 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15198 being exploited in the wild.

**How severe is CVE-2026-15198?** Medium severity, with a CVSS score of 6.5, 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-2026-15198?** 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-2026-15198 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-15198?** 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

CVE-2026-15198 is a missing authentication vulnerability (CWE-306) in the WebDAV API component of DSM. The attack requires only network access with no authentication or user interaction. An attacker can read specific files and conduct limited DoS attacks by directly accessing the unprotected WebDAV endpoint.

## 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)

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