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CVE record · CVE-2021-27648

Synology Antivirus Essential: Externally controlled reference to a resource in another sphere in quarantine…

CVSS 9.0 CriticalCriticalEPSS 0.028 · 86th percentile

Critical, because:

  • CVSS score 9.0: 9.0 or more.

How we decide what’s critical

Published by the CVE Program (CNA: synology) at 28 Apr 2021, 07:25 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Synology Synology Antivirus Essential
  • affected unspecified to before 1.4.8-2801 custom
Identifiers
CVE-2021-27648
CNA
synology
Weakness (CWE)
CWE-610
Tags
Published
28 Apr 2021
Updated
16 Sept 2024

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.0 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H CNA (synology)
  • CISA KEV Not listed.
  • EPSS 0.028, the 86th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 28 Apr 2021. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.