CVE-2026-124993 Missing authorization in DiskStation Manager (DSM)
Remote attackers can read specific files through an authorization flaw in Synology DSM's Security Advisor.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Harmful if only installed
- No
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-124993?
CVE-2026-124993 is a medium-severity missing authorization vulnerability in Synology DiskStation Manager (DSM), published on 12 Nov 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An incorrect authorization vulnerability in the Security Advisor in Synology DiskStation Manager (DSM) before 7.3.2-86009-5 and 7.4.1-90080-1 allows remote attackers to read specific files.
Weakness: CWE-863
Which versions are affected by CVE-2026-124993?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-124993?
No fix has been published for CVE-2026-124993 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-124993 being exploited?
There is no known exploitation of CVE-2026-124993 in the wild and no public exploit code.
Sources
Also known as GHSA-5737-cpp3-8657.