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.

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Vendors Products
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Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

CTEK will be sunsetting this product in April 2026. Please contact CTEK for more information  https://www.ctek.com/support .

History

Mon, 23 Mar 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 23 Mar 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Ctek
Ctek chargeportal
Vendors & Products Ctek
Ctek chargeportal

Fri, 20 Mar 2026 23:00:00 +0000

Type Values Removed Values Added
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.
Title CTEK Chargeportal Insufficient Session Expiration
Weaknesses CWE-613
References
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: icscert

Published:

Updated: 2026-03-23T14:17:03.447Z

Reserved: 2026-03-12T16:52:46.523Z

Link: CVE-2026-27649

cve-icon Vulnrichment

Updated: 2026-03-23T14:16:56.195Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-20T23:16:43.003

Modified: 2026-03-23T14:32:02.800

Link: CVE-2026-27649

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-23T09:52:16Z

Weaknesses