Quick answers
- Is CVE-2026-77738 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77738 being exploited in the wild.
- How severe is CVE-2026-77738?
- Medium severity, with a CVSS score of 4.3, published 12 November 2026.
- Which products and versions are affected?
- Synology DiskStation Manager 7.3.2 before 86009-5, 7.4.1 before 90080-1.
- Is there a fix for CVE-2026-77738?
- Yes: fixed in DSM 7.3.2-86009-5 or above, 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-2026-77738 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-77738?
- 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 or above, DSM 7.4.1-90080-1 or above
Technical details
The Credential API in DSM before versions 7.3.2-86009-5 and 7.4.1-90080-1 fails to properly validate server-side requests, allowing authenticated attackers to forge requests and access restricted files. The vulnerability requires valid user authentication and operates over the network without user interaction. Successful exploitation grants file read access beyond the attacker's intended permissions.
Affected products
- Synology DiskStation Manager 7.3.2 before 86009-5, 7.4.1 before 90080-1
Timeline
- 2026-11-10: disclosed
- 2026-11-12: advisory