CVE-2021-26563 Missing authorization in DiskStation Manager (DSM)
Local attackers can execute arbitrary code on Synology NAS devices due to incorrect authorization in the agent registration daemon.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26563?
CVE-2021-26563 is a high-severity missing authorization vulnerability in Synology Diskstation Manager, published on 26 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Incorrect authorization vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.4-25553 allows local users to execute arbitrary code via unspecified vectors.
Weakness: CWE-863
Which versions are affected by CVE-2021-26563?
It affects 4 products.
Products include Synology Diskstation Manager, Synology Diskstation Manager Unified Controller, Synology Skynas Firmware, Synology Vs960hd Firmware.
How do I fix CVE-2021-26563?
No fix has been published for CVE-2021-26563 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-2021-26563 being exploited?
There is no known exploitation of CVE-2021-26563 in the wild and no public exploit code.
Other vulnerabilities in Synology Diskstation Manager
Sources
Also known as GHSA-ppq5-6h29-8hm2.