CVE-2026-27647

High

Published: 27 February 2026

Published

27 February 2026

Modified

05 March 2026

KEV Added

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Patch

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CVSS Score 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS Score 0.0005 16.3th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-27647 is a high-severity Insufficient Session Expiration (CWE-613) vulnerability in Mobility46 Mobility46.Se. Its CVSS base score is 7.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 16.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 2 other techniques.

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-11 Device Lock

addresses: CWE-613

Locks the device (typically after inactivity) until re-authentication, addressing insufficient session expiration by preventing indefinite access.

AC-12 Session Termination

addresses: CWE-613

Automatically terminating sessions after a defined period directly enforces session expiration, preventing indefinite session lifetimes that attackers can exploit.

IA-11 Re-authentication

addresses: CWE-613

Re-authentication after inactivity or time-based triggers prevents indefinite use of potentially hijacked or stale sessions.

MA-4 Nonlocal Maintenance

addresses: CWE-613

Terminating sessions and network connections upon completion prevents insufficient session expiration.

SC-10 Network Disconnect

addresses: CWE-613

Directly enforces termination of network sessions after inactivity or end-of-session, preventing indefinite session lifetime.

SC-45 System Time Synchronization

addresses: CWE-613

Consistent clocks across systems allow session expiration and timeout enforcement to function as intended in distributed environments.

SI-14 Non-persistence

addresses: CWE-613

When the non-persistent artifact is a session or connection, mandatory termination implements the missing expiration that CWE-613 describes.

SI-21 Information Refresh

addresses: CWE-613

Timed refresh of session-related information or on-demand generation plus deletion implements proper session expiration.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1563 Remote Service Session Hijacking Lateral Movement

Adversaries may take control of preexisting sessions with remote services to move laterally in an environment.

attack.mitre.org →

T1550.004 Web Session Cookie Lateral Movement

Adversaries can use stolen session cookies to authenticate to web applications and services.

attack.mitre.org →

Why these techniques?

Vulnerability in public-facing WebSocket service directly enables remote exploitation (T1190); insufficient session expiration and reusable identifiers facilitate remote service session hijacking/takeover of charging station or user sessions (T1563) and use of hijacked web/session tokens for alternate authentication (T1550.004).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

NVD 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.

Deeper analysisAI

CVE-2026-27647 is a vulnerability in the WebSocket backend of a charging station management system, where session association relies on charging station identifiers. The implementation permits multiple endpoints to connect using the same session identifier, resulting in predictable session IDs. This flaw enables session hijacking or shadowing, as the most recent connection displaces the legitimate charging station and intercepts backend commands intended for it. The issue is rated with a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L) and maps to CWE-613 (Insufficient Session Expiration).

Remote attackers require no privileges or user interaction to exploit this vulnerability over the network with low complexity. An unauthorized user can hijack a session to authenticate as another user or legitimate charging station, potentially gaining limited access to commands or data. Alternatively, a malicious actor can shadow sessions or overwhelm the backend with valid session requests, leading to a denial-of-service condition that disrupts operations for affected charging stations.

Advisories published around the vulnerability disclosure on 2026-02-27 detail mitigation strategies, as outlined in CISA ICSA-26-057-08 (https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-08) and the corresponding CSAF JSON file (https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-08.json). Vendor contact information is available at https://www.mobility46.se/en/contact-us for further guidance on patches or workarounds.