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Case File

CVE-2021-27565

HIGH · CVSS 7.5 EPSS 2.59%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-08-19 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. It may be remotely exploitable. It may lead to a denial-of-service condition.

CVE
CVE-2021-27565
Severity
HIGH
CVSS
7.5
EPSS
2.59%

Original NVD Description

The web server in InterNiche NicheStack through 4.0.1 allows remote attackers to cause a denial of service (infinite loop and networking outage) via an unexpected valid HTTP request such as OPTIONS. This occurs because the HTTP request handler enters a miscoded wbs_loop() debugger hook.

Related CVEs

Other vulnerabilities affecting the same vendor(s)