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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (38.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.001
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-2026-27649?
- 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.