Cyber Resilience

CVE-2021-27648

Critical

Published: 28 April 2021

Published
28 April 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 9.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
EPSS Score 0.0989 93.2th percentile
Risk Priority 24 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-27648 is a critical-severity Externally Controlled Reference to a Resource in Another Sphere (CWE-610) vulnerability in Synology Antivirus Essential. Its CVSS base score is 9.0 (Critical).

Operationally, ranked in the top 6.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-610

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

synology
antivirus essential
≤ 1.4.8-2801

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-22 Information Diversity
addresses: CWE-610

Limits impact of an externally controlled reference to a primary information resource by switching to an identified alternative.

References