The networking software in Windows 95 and Windows 98 allows remote attackers to execute commands via a long file name string, aka the "File Access URL" vulnerability.
https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-049
Source: Mitre, NVD
Published: 1999-11-12
Updated: 2026-06-16
Base Score: 7.6
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.24907