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Case File

CVE-1999-1577

MEDIUM · CVSS 5.1 EPSS 19.49%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 1999-10-31 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.1. Its EPSS score suggests a 19.5% probability of exploitation in the next 30 days. It may be remotely exploitable.

CVE
CVE-1999-1577
Severity
MEDIUM
CVSS
5.1
EPSS
19.49%

Original NVD Description

Buffer overflow in HHOpen ActiveX control (hhopen.ocx) 1.0.0.1 for Internet Explorer 4.01 and 5 allows remote attackers to execute arbitrary commands via long arguments to the OpenHelp method.