CVE-2021-27648: synology antivirus_essential
CVSS: 9.0v3.1CriticalModified
Published 28-04-2021Last modified 16-09-2024
Vulnerability summary
CVE-2021-27648 is a critical (CVSS 9.0) vulnerability in synology antivirus_essential. EPSS estimates a 2.84% chance of exploitation in the next 30 days, higher than 86.5% of scored vulnerabilities.
CVSS score
9.0/10
010
Critical · v3.1 (CVE.org)EPSS score
2.84%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 28-04-2021PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.0Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:HSources2 sources · 8.8–9.0
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
Medium 6.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.84%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
0.00 pp
From 2.84% on 21-09-2026
21-09-202621-10-2026
EPSS score2.84%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Synology2 products
- antivirus_essential< 1.4.8-2801
- synology antivirus essential≥ unspecified, < 1.4.8-2801
1 vendor · 2 products