How severe is CVE-2000-1021?

CVE-2000-1021 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2000-1021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-1021?

CVE-2000-1021 affects Alt-n Mdaemon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2000-1021?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2000-1021 published?

CVE-2000-1021 was published on 2000-12-11 and last updated on 2026-06-16.

CVE-2000-1021

CVE-2000-1021 is a high-severity vulnerability in Alt-n Mdaemon with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Alt-n Mdaemon
Published: 2000-12-11
Last modified: 2026-06-16

Description

Heap overflow in WebConfig in Mdaemon 3.1.1 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long URL.

Frequently asked questions

What is CVE-2000-1021?: Heap overflow in WebConfig in Mdaemon 3.1.1 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long URL.
How severe is CVE-2000-1021?: CVE-2000-1021 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2000-1021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-1021?: CVE-2000-1021 affects Alt-n Mdaemon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2000-1021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2000-1021 published?: CVE-2000-1021 was published on 2000-12-11 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:alt-n:mdaemon:3.1.1:*:*:*:*:*:*:*

More vulnerabilities in Alt-n Mdaemon

CVE-2006-5709 — Critical (CVSS 10.0): Unspecified vulnerability in WorldClient in Alt-N Technologies MDaemon before 9.50 has unknown impact and attack…
CVE-2003-1470 — Critical (CVSS 9.0): Buffer overflow in IMAP service in MDaemon 6.7.5 and earlier allows remote authenticated users to cause a denial of…
CVE-2006-5708 — High (CVSS 7.5): Multiple unspecified vulnerabilities in MDaemon and WorldClient in Alt-N Technologies MDaemon before 9.50 allow…
CVE-2006-2646 — High (CVSS 7.5): Buffer overflow in Alt-N MDaemon, possibly 9.0.1 and earlier, allows remote attackers to execute arbitrary code via a…
CVE-2005-4266 — High (CVSS 7.5): WorldClient.dll in Alt-N MDaemon and WorldClient 8.1.3 trusts a Session parameter that contains a randomly generated…
CVE-2003-1200 — High (CVSS 7.5): Stack-based buffer overflow in FORM2RAW.exe in Alt-N MDaemon 6.5.2 through 6.8.5 allows remote attackers to execute…

All CVEs affecting Alt-n Mdaemon →