CVE-2021-27648

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.

Category

9.0
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 10.12% Top 10%
Vendor Advisory synology.com
Affected: Synology Synology Antivirus Essential
Published at:
Updated at:

References

Link Tags
https://www.synology.com/security/advisory/Synology_SA_21_15 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-27648?
CVE-2021-27648 has been scored as a critical severity vulnerability.
How to fix CVE-2021-27648?
To fix CVE-2021-27648, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-27648 being actively exploited in the wild?
It is possible that CVE-2021-27648 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~10% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-27648?
CVE-2021-27648 affects Synology Synology Antivirus Essential.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.