What is CVE-2026-6205?

CVE-2026-6205 is a high-severity vulnerability in Synology Diskstation Manager (Dsm), classified under External Control of File Name or Path. CVSS score: 8.1/10. Published 2026-09-18.

How severe is CVE-2026-6205?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Synology Diskstation Manager (Dsm)

CVE-2026-6205

An external control of file name or path vulnerability in Upload API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote authenticated users to write arbitrary files and conduct denial-of-service attacks.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Synology Diskstation Manager (Dsm)

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

security@synology.com

Frequently asked questions

What is CVE-2026-6205?: CVE-2026-6205 is a high-severity vulnerability in Synology Diskstation Manager (Dsm), classified under External Control of File Name or Path. CVSS score: 8.1/10. Published 2026-09-18.
How severe is CVE-2026-6205?: High severity. CVSS v3 base score is 8.1 out of 10.