CVE-2021-27183

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-04-14 · updated 2026-06-17
Weakness: CWE-610

Description

An issue was discovered in MDaemon before 20.0.4. Administrators can use Remote Administration to exploit an Arbitrary File Write vulnerability. An attacker is able to create new files in any location of the filesystem, or he may be able to modify existing files. This vulnerability may directly lead to Remote Code Execution.

Affected products

Altn Mdaemon: before 20.0.4 — fixed in 20.0.4

How to fix

Upgrade to a fixed version: Altn Mdaemon 20.0.4. Check the vendor advisory for mitigations.

References

https://github.com/chudyPB/MDaemon-Advisories
https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/
https://github.com/chudyPB/MDaemon-Advisories
https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/

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