CVE-2026-31904
Analyzed Analyzed - Analysis Complete

Authentication Request Rate Limiting Flaw in WebSocket API Enables DoS, Brute-Force

Vulnerability report for CVE-2026-31904, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-03-20

Last updated on: 2026-05-06

Assigner: ICS-CERT

Description

The WebSocket Application Programming Interface lacks restrictions on the number of authentication requests. This absence of rate limiting may allow an attacker to conduct denial-of-service attacks by suppressing or mis-routing legitimate charger telemetry, or conduct brute-force attacks to gain unauthorized access.

CVSS Scores

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Meta Information

Published
2026-03-20
Last Modified
2026-05-06
Generated
2026-07-06
AI Q&A
2026-03-21
EPSS Evaluated
2026-07-05
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
ctek charge_portal *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-307 The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.

Attack-Flow Graph

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Executive Summary

This vulnerability exists because the WebSocket Application Programming Interface does not limit the number of authentication requests that can be made. Without rate limiting, an attacker can repeatedly send authentication requests without restriction.

This lack of restriction can be exploited to perform denial-of-service attacks by interfering with legitimate charger telemetry data, either by suppressing it or mis-routing it. Additionally, attackers may attempt brute-force attacks to gain unauthorized access.

Impact Analysis

The vulnerability can impact you by enabling attackers to disrupt normal operations through denial-of-service attacks, which can suppress or mis-route legitimate telemetry data from chargers.

Furthermore, it can allow attackers to attempt brute-force attacks to gain unauthorized access, potentially compromising system security.

Overall, this can lead to service outages, loss of data integrity, and unauthorized control over the affected systems.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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