CVE-2021-27183

Name: CVE-2021-27183
Creator: NVD / NIST
Published: 2021-04-14T23:15:12.523+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 2.70%

Last modified Jun 17, 2026

CVE-2021-27183 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. An issue was discovered in MDaemon before 20.0.4. Administrators can use Remote Administration to exploit an Arbitrary File Write vulnerability. EPSS estimates a 2.70% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.2/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.70%

84.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-610

Affected Software

Vendor	Product	Versions
Altn	Mdaemon	< 20.0.4

References

https://github.com/chudyPB/MDaemon-AdvisoriesExploit, Third Party Advisory
https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/Release Notes, Vendor Advisory
https://github.com/chudyPB/MDaemon-AdvisoriesExploit, Third Party Advisory
https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/Release Notes, Vendor Advisory

Timeline

Published: Apr 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27183?

How severe is CVE-2021-27183?

CVE-2021-27183 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 2.70% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27183?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27183?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST