CVE-2021-29088

HIGHNVD 7.87.8—

7.8

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.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 11.7%
KEV: Not listed

Published

June 1, 2021

Last Modified

January 14, 2025

References (2)

security@synologyhttps://www.synology.com/security/advisory/Synology_SA_21_03
af854a3a-2127-422b-91ae-364da2661108https://www.synology.com/security/advisory/Synology_SA_21_03

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-22Path Traversal

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2021-29088?

CVE-2021-29088 is a high vulnerability published on June 1, 2021. 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.

When was CVE-2021-29088 disclosed?

CVE-2021-29088 was first published in the National Vulnerability Database on June 1, 2021, with the most recent update on January 14, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-29088 actively exploited?

CVE-2021-29088 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-29088?

CVE-2021-29088 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2021-29088?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-29088, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-29088

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-29088?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)