CVE-2021-43928: synology mail_station OS Command Injection
CVSS: 9.9v3.1CriticalModified
Published 07-02-2022Last modified 17-09-2024
Vulnerability summary
CVE-2021-43928 is a critical (CVSS 9.9) OS Command Injection vulnerability in synology mail_station. EPSS estimates a 1.86% chance of exploitation in the next 30 days, higher than 79% of scored vulnerabilities.
CVSS score
9.9/10
010
Critical · v3.1 (CVE.org)EPSS score
1.86%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 07-02-2022PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
Improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability in mail sending and receiving component in Synology Mail Station before 20211105-10315 allows remote authenticated users to execute arbitrary commands via unspecified vectors.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.9Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HSources2 sources · 8.8–9.9
- 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
1.86%
Chance of exploitation in the next 30 days
Percentile
79%
Versus all other CVEs
30-day change
0.00 pp
From 1.86% on 21-09-2026
21-09-202621-10-2026
EPSS score1.86%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Synology1 product
- mail_station≥ unspecified, < 20211105-10315 | < 20211105
1 vendor · 1 product