AUGUST 4, 2026
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Case File

CVE-2021-27648

CRITICAL · CVSS 9 EPSS 2.84%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-04-28 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.0. It may be remotely exploitable. Exploitation may require the attacker to be authenticated.

CVE
CVE-2021-27648
Severity
CRITICAL
CVSS
9
EPSS
2.84%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)