CVE-1999-0391

High CVSS 7.5

Published 1999-01-05 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-1999-0391, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

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.

Sources

NVD record for CVE-1999-0391

CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:P