Which products and versions are affected by CVE-2006-4364?

Affected: Mdaemon (Alt-N) versions 2.71_sp1, 2.8, 2.8.5.0, 3.0.3, 3.0.4, 3.1.1, 3.1.2, 3.1_beta. The full list is in the CVE brief.

Is CVE-2006-4364 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2006-4364 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2006-4364?

Public exploit code is available.

Is there a fix for CVE-2006-4364?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2006-4364 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2006-4364

MediumPublic exploit

Multiple heap-based buffer overflows in the POP3 server in Alt-N Technologies MDaemon before 9.0.6 allow remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via long strings that contain '@' characters in the (1) USER and (2) APOP…

Published Aug 26, 2006 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-2006-4364 is a medium-severity vulnerability (CVSS 5.0 v2) affecting Mdaemon (Alt-N).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 57% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

5.0

AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS (30-day exploit likelihood)

57%

Higher than 99.0% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2006-4364 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Affected Products

47 affected entries in total

Product	Affected versions	Fixed in
MdaemonAlt-N	2.71_sp1, 2.8, 2.8.5.0, 3.0.3, 3.0.4, 3.1.1, 3.1.2, 3.1_beta	n/a

Timeline

Publicly disclosed
Aug 26, 2006
Last updated
Apr 15, 2026

References

patch21595
exploitExploitDB-2258
exploithttp://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-08-04
exploit19651
otherhttp://files.altn.com/MDaemon/Release/RelNotes_en.txt

7 more references in the full CVE brief

FAQ

Common Questions.

Multiple heap-based buffer overflows in the POP3 server in Alt-N Technologies MDaemon before 9.0.6 allow remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via long strings that contain '@' characters in the (1) USER and (2) APOP commands.
Affected: Mdaemon (Alt-N) versions 2.71_sp1, 2.8, 2.8.5.0, 3.0.3, 3.0.4, 3.1.1, 3.1.2, 3.1_beta. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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