Quick answers
- Is CVE-2026-19833 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-19833 being exploited in the wild.
- How severe is CVE-2026-19833?
- Medium severity, with a CVSS score of 5.4, 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-2026-19833?
- Yes: fixed in DSM 7.3.2-86009-5, DSM 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-2026-19833 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-19833?
- 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, DSM 7.4.1-90080-1 or above
Technical details
A missing authorization check in the ACL API of DSM allows remote authenticated users to bypass access controls on specific files through improper authorization validation. The vulnerability requires valid user credentials and network access to the DSM interface. An authenticated attacker can read or write files outside their authorized scope.
Affected products
- Synology DiskStation Manager before 7.3.2-86009-5 and before 7.4.1-90080-1
Timeline
- 2026-11-10: disclosed
- 2026-11-10: advisory