Vulnerability · Published Mar 20, 2026 · Assigned by icscert
CVE-2026-27649CTEK Chargeportal Insufficient Session Expiration
High 7.3
In plain English
A high-severity security flaw in Chargeportal from CTEK. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| CTEK | Chargeportal | All versions |
Weakness: CWE-613 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L