CVE-2026-40530 Other in DiskStation Manager (DSM)
Authenticated attackers can exploit CRLF injection in the User API to read or write arbitrary files and cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-40530?
CVE-2026-40530 is a high-severity vulnerability in Synology DiskStation Manager (DSM), published on 18 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
An improper neutralization of CRLF sequences ('CRLF injection') vulnerability in User API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote authenticated users to read or write arbitrary files and conduct denial-of-service attacks after the system is rebooted.
Weakness: CWE-93
Which versions are affected by CVE-2026-40530?
How do I fix CVE-2026-40530?
No fix has been published for CVE-2026-40530 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-40530 being exploited?
There is no known exploitation of CVE-2026-40530 in the wild and no public exploit code.
Sources
Also known as GHSA-j93c-qcgp-gv6m.