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TI-1999-00386 Aliases CVE-1999-0391GHSA-9xx2-9vgq-cg78

The cryptographic challenge of SMB authentication in Windows 95 and Windows 98 can be…

Priority MEDIUM 41Published · 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 · Partial · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

The cryptographic challenge of SMB authentication in Windows 95 and Windows 98 can be reused, allowing an attacker to replay the response and impersonate a user.

Why it matters now

EPSS 0.04891 92nd 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

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 13

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:terminal_server:*:*:*:*:*:*:*:*all versionsVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*all versionsVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_nt:3.5.1:sp1:*:*:*:*:*:*3.5.1 sp1VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_nt:3.5.1:sp2:*:*:*:*:*:*3.5.1 sp2VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_nt:3.5.1:sp3:*:*:*:*:*:*3.5.1 sp3VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_nt:3.5.1:sp4:*:*:*:*:*:*3.5.1 sp4VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_nt:3.5.1:sp5:*:*:*:*:*:*3.5.1 sp5VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*4.0VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_nt:4.0:sp1:*:*:*:*:*:*4.0 sp1VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_nt:4.0:sp2:*:*:*:*:*:*4.0 sp2VulnerableMicrosoft
  • cpe:2.3:a:microsoft:terminal_server:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_nt:3.5.1:sp1:*:*:*:*:*:* Versions 3.5.1 sp1 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_nt:3.5.1:sp2:*:*:*:*:*:* Versions 3.5.1 sp2 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_nt:3.5.1:sp3:*:*:*:*:*:* Versions 3.5.1 sp3 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_nt:3.5.1:sp4:*:*:*:*:*:* Versions 3.5.1 sp4 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_nt:3.5.1:sp5:*:*:*:*:*:* Versions 3.5.1 sp5 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:sp1:*:*:*:*:*:* Versions 4.0 sp1 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_nt:4.0:sp2:*:*:*:*:*:* Versions 4.0 sp2 Vulnerable ·Microsoft
Show 3 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_nt:4.0:sp3:*:*:*:*:*:*4.0 sp3VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_nt:4.0:sp4:*:*:*:*:*:*4.0 sp4VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_nt:4.0:sp5:*:*:*:*:*:*4.0 sp5VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_nt:4.0:sp3:*:*:*:*:*:* Versions 4.0 sp3 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_nt:4.0:sp4:*:*:*:*:*:* Versions 4.0 sp4 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_nt:4.0:sp5:*:*:*:*:*:* Versions 4.0 sp5 Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-1999-0391
  2. 2026-10-03 Alias added: GHSA-9xx2-9vgq-cg78

References

Other 1

  • TI-2001-00525 Memory leak in Terminal servers in Windows NT and Windows 2000 allows remote attackers to… CVSS 2.0MEDIUM 5.0
  • TI-2000-00305 Windows 95, Windows 98, Windows 2000, Windows NT 4.0, and Terminal Server systems allow a… CVSS 2.0HIGH 7.8
  • TI-2006-04313 Microsoft Terminal Server, when running an application session with the "Start program at… CVSS 2.0HIGH 10.0
  • TI-1999-00859 Multihomed Windows systems allow a remote attacker to bypass IP source routing… CVSS 2.0HIGH 7.5
  • TI-2007-02505 The Terminal Server in Microsoft Windows 2003 Server, when using TLS, allows remote… CVSS 2.0HIGH 7.5
  • TI-2000-00404 The CIFS Computer Browser service allows remote attackers to cause a denial of service by… CVSS 2.0MEDIUM 5.0
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences