CVE-1999-0721

High

Published: 20/07/1999(UTC)Updated: 16/06/2026(UTC)Translated: 17/06/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Very high risk

8.53%

94th percentile - higher than 94% of all known CVEs

Summary

CVE-1999-0721 vulnerability affects the Local Security Authority (LSA) service in Windows NT, which is susceptible to a denial of service (DoS) attack through a malformed LSA request.

Risk Assessment

An attacker can exploit this vulnerability to disrupt access to the LSA service, potentially leading to significant system operational issues.

Recommendation

It is recommended to update Windows NT to the latest version and to monitor and filter requests to LSA to minimize risk.

Original NVD description (English source)

Denial of service in Windows NT Local Security Authority (LSA) through a malformed LSA request.