CVE-2021-29088

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-01 · updated 2026-06-17
Weakness: CWE-22

Description

Improper limitation of a pathname to a restricted directory ('Path Traversal') in cgi component in Synology DiskStation Manager (DSM) before 6.2.4-25553 allows local users to execute arbitrary code via unspecified vectors.

Affected products

Synology DiskStation Manager: before 6.2.4-25553 — fixed in 6.2.4-25553

How to fix

Upgrade to a fixed version: Synology DiskStation Manager 6.2.4-25553. Check the vendor advisory for mitigations.

References

https://www.synology.com/security/advisory/Synology_SA_21_03
https://www.synology.com/security/advisory/Synology_SA_21_03

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