What is CVE-2026-40530?

CVE-2026-40530 is a high-severity vulnerability in Synology Diskstation Manager (Dsm), classified under CRLF Injection. CVSS score: 8.0/10. Published 2026-09-18.

How severe is CVE-2026-40530?

High severity. CVSS v3 base score is 8.0 out of 10.

Vulnerability in Synology Diskstation Manager (Dsm)

CVE-2026-40530

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.

Vulnerability class: CRLF Injection

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

Affected products

Synology Diskstation Manager (Dsm)

Weakness classification (CWE)

CWE-93 — CRLF Injection

References

security@synology.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-40530?: CVE-2026-40530 is a high-severity vulnerability in Synology Diskstation Manager (Dsm), classified under CRLF Injection. CVSS score: 8.0/10. Published 2026-09-18.
How severe is CVE-2026-40530?: High severity. CVSS v3 base score is 8.0 out of 10.