CVE-2026-13639: 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…

PriorityP356critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

0.51%

42.2th percentile

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

4 ranges

Vendor	Product	Version range	Fixed in
synology	diskstation_manager	>= 7.2.1 < 7.2.1-69057-12	7.2.1-69057-12
synology	diskstation_manager	>= 7.2.2 < 7.2.2-72806-9	7.2.2-72806-9
synology	diskstation_manager	>= 7.3.2 < 7.3.2-86009-4	7.3.2-86009-4
synology	diskstation_manager	>= 7.4 < 7.4-90075	7.4-90075

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.