What’s Vulnerable › Vulnerabilities

CVE-2021-29083

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-01 · updated 2026-06-17
• Weakness: CWE-78

Description

Improper neutralization of special elements used in an OS command in SYNO.Core.Network.PPPoE in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote authenticated users to execute arbitrary code via realname parameter.

Affected products

• Synology DiskStation Manager: before 6.2.3-25426-3 — fixed in 6.2.3-25426-3

How to fix

Upgrade to a fixed version: Synology DiskStation Manager 6.2.3-25426-3. Check the vendor advisory for mitigations.

References

• https://www.synology.com/security/advisory/Synology_SA_20_26
• https://www.synology.com/security/advisory/Synology_SA_20_26

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