What’s Vulnerable › Vulnerabilities

CVE-2024-14034: Hirschmann HiEOS Authentication Bypass via HTTP Management Module

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-02 · updated 2026-07-24
• Weakness: CWE-287

Description

Hirschmann HiEOS devices versions prior to 01.1.00 contain an authentication bypass vulnerability in the HTTP(S) management module that allows unauthenticated remote attackers to gain administrative access by sending specially crafted HTTP(S) requests. Attackers can exploit improper authentication handling to obtain elevated privileges and perform unauthorized actions including configuration download or upload and firmware modification.

Affected products

• Belden Hirschmann HiEOS LRS11: before 01.1.00 — fixed in 01.1.00

How to fix

Upgrade to a fixed version: Belden Hirschmann HiEOS LRS11 01.1.00. Check the vendor advisory for mitigations.

References

• https://assets.belden.com/m/7ec5c6da25ef288/original/Belden_Security_Bulletin_BSECV-2024-02_1v0.pdf
• https://www.vulncheck.com/advisories/hirschmann-hieos-authentication-bypass-via-http-management-module

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