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CVE-2026-31904— CTEK Chargeportal Improper Restriction of Excessive Authentication Attempts

Quick assessment

Affected
CTEK Chargeportal
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CTEK Chargeportal是瑞典CTEK公司的一个电动车充电管理平台。 CTEK Chargeportal存在安全漏洞，该漏洞源于WebSocket应用程序编程接口缺少对身份验证请求数量的限制，可能导致攻击者进行拒绝服务攻击或暴力破解攻击。

CVSS 7.5 · High EPSS 0.78% · P54
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I. Basic Information for CVE-2026-31904

Vulnerability Information
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Vulnerability Title
CTEK Chargeportal Improper Restriction of Excessive Authentication Attempts
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
CTEK Chargeportal 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CTEK Chargeportal是瑞典CTEK公司的一个电动车充电管理平台。 CTEK Chargeportal存在安全漏洞，该漏洞源于WebSocket应用程序编程接口缺少对身份验证请求数量的限制，可能导致攻击者进行拒绝服务攻击或暴力破解攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
CTEK Chargeportal All versions -

II. Public POCs for CVE-2026-31904

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III. Intelligence Information for CVE-2026-31904

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Vendor Advisories for CVE-2026-31904 (2)

Vendor Pages for CVE-2026-31904 (1)

Same Patch Batch · CTEK · 2026-03-20 · 4 CVEs total

CVE-2026-25192 9.4 CRITICAL CTEK Chargeportal Missing Authentication for Critical Function
CVE-2026-27649 7.3 HIGH CTEK Chargeportal Insufficient Session Expiration
CVE-2026-28204 6.5 MEDIUM CTEK Chargeportal Insufficiently Protected Credentials

IV. Related Vulnerabilities

Same product: Chargeportal
Same vendor: CTEK
Same weakness: CWE-307

V. Comments for CVE-2026-31904

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