Vulnerability · Published Sep 18, 2026 · Assigned by synology
CVE-2026-13639
Critical 9.8
In plain English
A critical-severity security flaw in DiskStation Manager (DSM) from Synology. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 48.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An insufficient entropy vulnerability in login logic 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 attackers to read or write arbitrary files and conduct denial-of-service attacks.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Synology | DiskStation Manager (DSM) | 7.4 – before 7.4-900757.3.2 – before 7.3.2-86009-47.2.2 – before 7.2.2-72806-97.2.1 – before 7.2.1-69057-12 |
Weakness: CWE-331 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H