Vulnerabilities in RPC servers in (1) Microsoft Exchange Server 2000 and earlier, (2)…
Priority MEDIUM 40CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Vulnerabilities in RPC servers in (1) Microsoft Exchange Server 2000 and earlier, (2) Microsoft SQL Server 2000 and earlier, (3) Windows NT 4.0, and (4) Windows 2000 allow remote attackers to cause a denial of service via malformed inputs.
Why it matters now
EPSS 0.16975 97th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:exchange_server:5.0:-:*:*:*:*:*:* | 5.0 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:5.5:-:*:*:*:*:*:* | 5.5 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:exchange_server:2000:-:*:*:*:*:*:* | 2000 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:sql_server:7.0:-:*:*:*:*:*:* | 7.0 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:sql_server:2000:-:*:*:*:*:*:* | 2000 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:windows_nt:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2000:-:-:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:* | all versions | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:exchange_server:5.0:-:*:*:*:*:*:* Versions 5.0 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:5.5:-:*:*:*:*:*:* Versions 5.5 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:exchange_server:2000:-:*:*:*:*:*:* Versions 2000 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:sql_server:7.0:-:*:*:*:*:*:* Versions 7.0 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:sql_server:2000:-:*:*:*:*:*:* Versions 2000 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:windows_nt:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2000:-:-:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2001-0509
- 2026-10-03 Alias added: GHSA-h45q-cxr9-cw4p
References
Patch 1
Advisory 1
More Microsoft Exchange Server vulnerabilities
- TI-2024-14170 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2022-19610 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2021-13547 Microsoft Exchange Server Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2021-13502 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2021-08465 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2023-07929 Microsoft Exchange Server Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2001-0509 · CVE Program
- CVE-2001-0509 · NVD
- FIRST EPSS
- GHSA-h45q-cxr9-cw4p · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences