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CRITICAL

CVE-2026-13639

CVSS v3

9.8

CRITICAL

EPSS Score

0.7 %

exploit probability, as of 2026-09-28

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2026-09-18
Last Modified
2026-09-18

Frequently asked questions

What is 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 allows remote attackers to read or write arbitrary files and conduct denial-of-service attacks.

Is CVE-2026-13639 actively exploited?

Active exploitation of CVE-2026-13639 has not been confirmed. Its EPSS score was 0.7% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-13639?

CVE-2026-13639 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2026-13639 affecting your environment?

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