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Servers and applications

CVE-2002-0054

SMTP service in (1) Microsoft Windows 2000 and (2) Internet Mail Connector (IMC) in Exchange Server 5.5 does not properly handle responses to NTLM authentication, which allows remote attackers to perform mail relaying via an SMTP AUTH command using null session credentials.

Severity
High 7.5
Published
8 Mar 2002
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
22% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Authentication bypass by capture-replay (CWE-294)
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
Microsoft Exchange ServerServers and applications · cpe:a:microsoft:exchange_server
  • Version 5.5
  • Version 5.5-sp1
  • Version 5.5-sp2
  • Version 5.5-sp3
  • Version 5.5-sp4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2002-0054
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2002-0054