CVE-2021-26566 Information disclosure in Synology DiskStation Manager (DSM)
Man-in-the-middle attackers can execute arbitrary commands via inbound QuickConnect traffic due to sensitive information leakage in Synology DSM.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-26566?
CVE-2021-26566 is a high-severity vulnerability in Synology Diskstation Manager, published on 26 Feb 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Insertion of sensitive information into sent data vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to execute arbitrary commands via inbound QuickConnect traffic.
Which versions are affected by CVE-2021-26566?
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-2021-26566?
No fix has been published for CVE-2021-26566 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-26566 being exploited?
There is no known exploitation of CVE-2021-26566 in the wild and no public exploit code.
Other vulnerabilities in Synology Diskstation Manager
Sources
Also known as GHSA-x5fh-xfvr-gg7m.