How severe is CVE-2002-0054?

CVE-2002-0054 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2002-0054 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2002-0054?

CVE-2002-0054 primarily affects Microsoft Exchange Server. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2002-0054?

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-2002-0054 published?

CVE-2002-0054 was published on 2002-03-08 and last updated on 2026-06-16.

CVE-2002-0054

CVE-2002-0054 is a high-severity vulnerability in Microsoft Exchange Server with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 22% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-294.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 22% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-294
Affected product: Microsoft Exchange Server
Published: 2002-03-08
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2002-0054?: CVE-2002-0054 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2002-0054 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 22% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-0054?: CVE-2002-0054 primarily affects Microsoft Exchange Server. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2002-0054?: 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-2002-0054 published?: CVE-2002-0054 was published on 2002-03-08 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:a:microsoft:exchange_server:5.5:-:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:5.5:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:5.5:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:5.5:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:exchange_server:5.5:sp4:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2000:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2000:-:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2000:-:sp2:*:*:*:*:*:*

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