CVE-2021-27648

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-28 · updated 2026-06-17
Weakness: CWE-610

Description

Externally controlled reference to a resource in another sphere in quarantine functionality in Synology Antivirus Essential before 1.4.8-2801 allows remote authenticated users to obtain privilege via unspecified vectors.

Affected products

Synology Antivirus Essential: before 1.4.8-2801 — fixed in 1.4.8-2801

How to fix

Upgrade to a fixed version: Synology Antivirus Essential 1.4.8-2801. Check the vendor advisory for mitigations.

References

https://www.synology.com/security/advisory/Synology_SA_21_15
https://www.synology.com/security/advisory/Synology_SA_21_15

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