Heap Overflow in Hirschmann HiLCOS Web Interface Causes DoS

Publication date: 2026-04-02

Last updated on: 2026-05-26

Assigner: VulnCheck

Description

Hirschmann EagleSDV firmware prior to 05.4.02 contains a denial-of-service vulnerability in TLS session establishment. Attackers can crash the device during TLS handshake by exploiting protocol downgrades to TLS 1.0 or TLS 1.1, interrupting service availability.

CVSS Scores

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Meta Information

Published

2026-04-02

Last Modified

2026-05-26

Generated

2026-07-06

AI Q&A

2026-04-03

EPSS Evaluated

2026-07-05

NVD

CVE-2024-14033

Affected Vendors & Products

Vendor	Product	Version / Range
hirschmann	hilcos	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-400	The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

Executive Summary

This vulnerability is a heap overflow in the HiLCOS web interface of Hirschmann Industrial IT products. It allows unauthenticated remote attackers to send specially crafted requests that trigger a denial-of-service condition by crashing the affected device.

The issue is particularly impactful when the Public Spot functionality is enabled on the device.

Impact Analysis

Exploitation of this vulnerability can cause the affected device to crash, resulting in a denial-of-service condition and service disruption.

This can impact availability of the device, especially in environments where the Public Spot functionality is used.

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