Is CVE-2026-40537 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-40537 being exploited in the wild.

How severe is CVE-2026-40537?

Medium severity, with a CVSS score of 4.3, published 18 September 2026.

Which products and versions are affected?

Synology DiskStation Manager 7.2.1 before 69057-10, 7.2.2 before 72806-7, 7.3.2 before 86009-2.

Is there a fix for CVE-2026-40537?

A patch was published on 2026-04-15: Patches released: DSM 7.2.1-69057-10, 7.2.2-72806-7, 7.3.2-86009-2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-40537 attacked?

It is attacked over the network.

Am I affected by CVE-2026-40537?

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.

CVE-2026-40537: Synology DiskStation Manager SSRF in PersonMail API

CVE-2026-40537 · Severity: medium · CVSS 4.3 · Published 2026-09-18

Synology DiskStation Manager is a centralized management system for NAS devices that handles file storage, sharing, and email integration. The PersonMail API contains a server-side request forgery vulnerability that allows authenticated users to make unauthorized requests to internal systems, potentially exposing non-sensitive information and expanding attack surface within the network. Organizations running affected DSM versions should prioritize patching to prevent lateral movement and data exposure.

Technologies: Synology DiskStation Manager. Vendors: Synology.

Quick answers

Is CVE-2026-40537 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-40537 being exploited in the wild.
How severe is CVE-2026-40537?: Medium severity, with a CVSS score of 4.3, published 18 September 2026.
Which products and versions are affected?: Synology DiskStation Manager 7.2.1 before 69057-10, 7.2.2 before 72806-7, 7.3.2 before 86009-2.
Is there a fix for CVE-2026-40537?: A patch was published on 2026-04-15: Patches released: DSM 7.2.1-69057-10, 7.2.2-72806-7, 7.3.2-86009-2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-40537 attacked?: It is attacked over the network.
Am I affected by CVE-2026-40537?: 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.

Technical details

This is a server-side request forgery (SSRF) vulnerability in the PersonMail API component of Synology DSM, classified as CWE-918. The vulnerability requires authentication (remote authenticated users) but does not require user interaction or special configuration, making it accessible to any user with valid credentials. An attacker can exploit this to make requests to internal services or resources from the server's perspective, obtaining non-sensitive information. The vulnerability affects DSM 7.2.1 before 69057-10, DSM 7.2.2 before 72806-7, and DSM 7.3.2 before 86009-2; patches are available and should be applied immediately.

Affected products

Synology DiskStation Manager 7.2.1 before 69057-10, 7.2.2 before 72806-7, 7.3.2 before 86009-2

Timeline

2026-04-15: disclosed: Advisory published by Synology
2026-04-15: patched: Patches released: DSM 7.2.1-69057-10, 7.2.2-72806-7, 7.3.2-86009-2
2026-09-18: advisory: CVE-2026-40537 published to NVD

References

https://www.synology.com/en-global/security/advisory/Synology_SA_26_06

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