Synology DiskStation Manager up to 7.4-90074 Login Logic entropy

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Synology DiskStation Manager up to 7.2.0/7.2.1-69057-11/7.2.2-72806-8/7.3.2-86009-3/7.4-90074. This impacts an unknown function of the component Login Logic. Performing a manipulation results in entropy. This vulnerability is reported as CVE-2026-13639. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Synology DiskStation Manager up to 7.2.0/7.2.1-69057-11/7.2.2-72806-8/7.3.2-86009-3/7.4-90074. It has been classified as problematic. This affects some unknown processing of the component Login Logic. The manipulation with an unknown input leads to a entropy vulnerability. CWE is classifying the issue as CWE-331. The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others. This is going to have an impact on confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at synology.com. This vulnerability is uniquely identified as CVE-2026-13639 since 06/29/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

Upgrading to version 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 or 7.4-90075 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (synology): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Entropy
CWE: CWE-331 / CWE-330 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: DiskStation Manager 7.2.1-69057-12/7.2.2-72806-9/7.3.2-86009-4/7.4-90075

Timelineinfo

06/29/2026 CVE reserved
09/18/2026 +81 days Advisory disclosed
09/18/2026 +0 days VulDB entry created
09/18/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: synology.com

Advisory: synology.com
Status: Confirmed

CVE: CVE-2026-13639 (🔒)
GCVE (CVE): GCVE-0-2026-13639
GCVE (VulDB): GCVE-100-407427

Entryinfo

Created: 09/18/2026 10:43
Changes: 09/18/2026 10:43 (64)
Complete: 🔍
Cache ID: 216::103

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