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Fencer Vulns
high 7.5

CVE-1999-0284 in the critical feed json

Denial of service to NT mail servers including Ipswitch, Mdaemon, and Exchange through a buffer overflow in the SMTP HELO command.

published 1998-01-01 28 y ago modified 2026-06-16 4 mo ago also EUVD-1999-0284

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
11.5%
EPSS 11.5% chance of exploitation in 30 days, percentile 96%
public exploits
3
Exploit-DB

Summary

Denial of service to NT mail servers including Ipswitch, Mdaemon, and Exchange through a buffer overflow in the SMTP HELO command.

Timeline

  1. Published
  2. First public exploit (EDB-23145)

Exploit prediction

11.53% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-23146 Alt-N MDaemon Server 2.71 SP1 - SMTP HELO Argument Buffer Overflow dos, 1999-03-10
  • EDB-23145 Ipswitch Imail Server 5.0 - SMTP HELO Argument Buffer Overflow dos, 1998-03-10
  • EDB-23113 Microsoft Exchange Server 4.0/5.0 - SMTP HELO Argument Buffer Overflow remote, 1998-03-10

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.