9.8

CVE-2026-13639: synology diskstation manager (dsm) Insufficient Entropy

CVSS: 9.8v3.1CriticalAwaiting analysis
Published 18-09-2026Last modified 18-09-2026
Open JSON

Vulnerability summary

CVE-2026-13639 is a critical (CVSS 9.8) Insufficient Entropy vulnerability in synology diskstation manager (dsm). EPSS estimates a 0.66% chance of exploitation in the next 30 days, higher than 51.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.66%
0%100%
Low · +0.16 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 18-09-2026
    PublishedVulnerability first disclosed.
  2. 18-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.66%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

+0.16 pp

From 0.51% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.66%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Synology1 product
  • diskstation manager (dsm)≥ 7.4, < 7.4-90075 | ≥ 7.3.2, < 7.3.2-86009-4 | ≥ 7.2.2, < 7.2.2-72806-9 | ≥ 7.2.1, < 7.2.1-69057-12

1 vendor · 1 product

References

1 links