CVE-2024-26001
CWE-787Published: March 12, 2024· Updated: Jun 17, 2026
Official Description
An unauthenticated remote attacker can write memory out of bounds due to improper input validation in the MQTT stack. The brute force attack is not always successful because of memory randomization.
Risk Analysis
The MQTT stack in Phoenix Contact CHARX SEC controllers is vulnerable to out-of-bounds memory writes due to poor input validation. This critical flaw allows unauthenticated remote attackers to potentially execute code, though memory randomization may hinder brute force attempts.
No public exploit is known, and it is not in the KEV catalog. The vulnerability is remotely exploitable with low complexity.
Users should apply the latest firmware updates provided by Phoenix Contact for the affected CHARX SEC-3000, 3050, and 3100 devices.
Technical Analysis
CVE-2024-26001 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-787)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2024-26001 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts