Vulnerability in Ctek Charge Portal
CVE-2026-31904
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.008 (54.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.008 · change: +0.004
Affected products
- Ctek Charge Portal
- Ctek Chargeportal — versions All versions
Weakness classification (CWE)
References
- www.cisa.gov/news-events/ics-advisories/icsa-26-078-06 (US Government Resource, Third Party Advisory)
- github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-078-06.js… (Product)
- www.ctek.com/support (Product)
Frequently asked questions
- What is CVE-2026-31904?
- CVE-2026-31904 is a high-severity vulnerability in Ctek Charge Portal, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.5/10. Published 2026-03-20.
- How severe is CVE-2026-31904?
- High severity. CVSS v3 base score is 7.5 out of 10.