CVE-2026-31904 Details
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.
A vulnerability exists in the WebSocket API of CTEK Chargeportal, all versions, due to a lack of rate limiting on authentication requests. This flaw could enable attackers to perform denial-of-service attacks by disrupting or misdirecting legitimate charger telemetry, or to execute brute-force attacks to gain unauthorized access.
CTEK will be discontinuing this product in April 2026. For more information, please contact CTEK support.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 23, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-078-06.json | [email protected] | Product |
| https://www.cisa.gov/news-events/ics-advisories/icsa-26-078-06 | [email protected] | Third Party AdvisoryUS Government Resource |
| https://www.ctek.com/support | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-307 | Improper Restriction of Excessive Authentication Attempts | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| ctek charge portal | All versions |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 6, 2026 | Initial Analysis | [email protected] |
| Mar 20, 2026 | New CVE Received | [email protected] |