Vulnerability in Ctek Charge Portal
CVE-2026-27649
The WebSocket backend uses charging station identifiers to uniquely associate sessions but allows multiple endpoints to connect using the same session identifier. This implementation results in predictable session identifiers and enables session hijacking or shadowing, where the most recent connection displaces the legitimate charging station and receives backend commands intended for that station. This vulnerability may allow unauthorized users to authenticate as other users or enable a malicious actor to cause a denial-of-service condition by overwhelming the backend with valid session requests.
EPSS: 0.003 (25.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Ctek Charge_portal
- Ctek Chargeportal — versions All versions
Weakness classification (CWE)
References
- ics-cert@hq.dhs.gov (US Government Resource, Third Party Advisory)
- ics-cert@hq.dhs.gov (Product)
- ics-cert@hq.dhs.gov (Product)
Frequently asked questions
- What is CVE-2026-27649?
- CVE-2026-27649 is a high-severity vulnerability in Ctek Charge Portal, classified under Insufficient Session Expiration. CVSS score: 7.3/10. Published 2026-03-20.
- How severe is CVE-2026-27649?
- High severity. CVSS v3 base score is 7.3 out of 10.