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
Published Apr 2, 2003
7.5
HIGHCVSS 2.0
EPSS 22.44%
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.
Affected products
No data.
Configuration 1
- 5.5
- 5.5
- 5.5
- 5.5
- 5.5
Configuration 2
- n/a
- n/a
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 22.44% (0.22438) | 97.63th | v5 (v2026.06.15) |
| Jun 15, 2026 | 22.44% (0.22438) | 97.39th | v5 (v2026.06.15) |
| Dec 28, 2025 | 12.54% (0.12536) | 93.70th | v4 (v2025.03.14) |
| Dec 27, 2025 | 8.24% (0.08243) | 91.95th | v4 (v2025.03.14) |
| Oct 28, 2025 | 12.54% (0.12536) | 93.63th | v4 (v2025.03.14) |
| Oct 27, 2025 | 8.24% (0.08243) | 91.84th | v4 (v2025.03.14) |
| Oct 23, 2025 | 12.54% (0.12536) | 93.62th | v4 (v2025.03.14) |
| Oct 1, 2025 | 14.82% (0.14817) | 94.31th | v4 (v2025.03.14) |
| Mar 30, 2025 | 8.24% (0.08243) | 91.42th | v4 (v2025.03.14) |
| Mar 29, 2025 | 6.70% (0.06699) | 85.02th | v4 (v2025.03.14) |
| Mar 19, 2025 | 8.52% (0.08515) | 91.31th | v4 (v2025.03.14) |
| Mar 18, 2025 | 7.03% (0.07033) | 90.85th | v4 (v2025.03.14) |
| Mar 17, 2025 | 8.96% (0.08961) | 91.98th | v4 (v2025.03.14) |
| Dec 12, 2024 | 4.65% (0.04652) | 92.89th | v3 (v2023.03.01) |
| Aug 10, 2024 | 4.65% (0.04652) | 92.70th | v3 (v2023.03.01) |
| Jan 29, 2024 | 1.20% (0.01200) | 83.71th | v3 (v2023.03.01) |
| Sep 11, 2023 | 0.61% (0.00613) | 76.08th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.60% (0.00599) | 75.12th | v3 (v2023.03.01) |
| Mar 6, 2023 | 11.68% (0.11676) | 95.15th | v2 (v2022.01.01) |
| Apr 1, 2022 | 11.68% (0.11676) | 94.76th | v2 (v2022.01.01) |
| Feb 4, 2022 | 11.68% (0.11676) | 88.93th | v2 (v2022.01.01) |
References (3)
- http://marc.info/?l=bugtraq&m=101501580409373&w=2 mailing-listx_refsource_BUGTRAQMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/4205 vdb-entryx_refsource_BIDPatchThird Party AdvisoryVDB Entry
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-011 vendor-advisoryx_refsource_MSPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://marc.info/?l=bugtraq&m=101501580409373&w=2 | mailing-listx_refsource_BUGTRAQMailing ListThird Party Advisory | |
| http://www.securityfocus.com/bid/4205 | vdb-entryx_refsource_BIDPatchThird Party AdvisoryVDB Entry | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-011 | vendor-advisoryx_refsource_MSPatchVendor Advisory |
Change history (0)
No recorded changes yet.