Windows NT with SYSKEY reuses the keystream that is used for encrypting SAM password…
Priority LOW 33CWE-255Published · 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
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Windows NT with SYSKEY reuses the keystream that is used for encrypting SAM password hashes, allowing an attacker to crack passwords.
Why it matters now
EPSS 0.07136 94th 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:*:*:*:*:*:*:* | 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:sp1:enterprise:*:*:*:*:* | 4.0 sp1 | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:* 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:sp1:enterprise:*:*:*:*:* Versions 4.0 sp1 Vulnerable ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-1999-0994
- 2026-10-03 Alias added: GHSA-r7rj-gr4g-8x94
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-1999-0994 · CVE Program
- CVE-1999-0994 · NVD
- FIRST EPSS
- GHSA-r7rj-gr4g-8x94 · 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