Windows NT 4.0 does not properly shut down invalid named pipe RPC connections, which…
Priority MEDIUM 50CWE-772Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-772.
Summary
Windows NT 4.0 does not properly shut down invalid named pipe RPC connections, which allows remote attackers to cause a denial of service (resource exhaustion) via a series of connections containing malformed data, aka the "Named Pipes Over RPC" vulnerability.
Why it matters now
EPSS 0.17745 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 · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_nt:4.0:-:*:*:enterprise:*:*:* | 4.0 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:-:*:*:server:*:*:* | 4.0 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:-:*:*:terminal_server:*:*:* | 4.0 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_nt:4.0:-:*:*:workstation:*:*:* | 4.0 | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_nt:4.0:-:*:*:enterprise:*:*:* Versions 4.0 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:-:*:*:server:*:*:* Versions 4.0 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:-:*:*:terminal_server:*:*:* Versions 4.0 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_nt:4.0:-:*:*:workstation:*:*:* Versions 4.0 Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-1999-1127
- 2026-10-03 Alias added: GHSA-fjjp-8g8w-55f2
References
Other 1
More Microsoft Windows Nt vulnerabilities
- TI-2004-00181 The POSIX component of Microsoft Windows NT and Windows 2000 allows local users to… KEVCVSS 3.1HIGH 7.8
- TI-2002-00354 smss.exe debugging subsystem in Windows NT and Windows 2000 does not properly… KEVCVSS 3.1HIGH 7.8
- TI-2004-00977 The WINS service (wins.exe) on Microsoft Windows NT Server 4.0, Windows 2000 Server, and… CVSS 2.0HIGH 10.0
- TI-2002-00376 Integer overflow in xdr_array function in RPC servers for operating systems that use… CVSS 3.1CRITICAL 9.8
- TI-2000-01078 Buffer overflow in Microsoft Phone Book Service allows local users to execute arbitrary… CVSS 2.0HIGH 10.0
- TI-1999-00824 Buffer overflow in IIS 4.0 allows remote attackers to cause a denial of service via a… CVSS 2.0HIGH 10.0
Sources
- CVE-1999-1127 · CVE Program
- CVE-1999-1127 · NVD
- FIRST EPSS
- GHSA-fjjp-8g8w-55f2 · 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