CVE-2026-27764
Published: 06 March 2026
Summary
CVE-2026-27764 is a high-severity Insufficient Session Expiration (CWE-613) vulnerability in Mvm Mobiliti E-Mobi.Hu. Its CVSS base score is 7.3 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Valid Accounts (T1078); ranked at the 15.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
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.
Locks the device (typically after inactivity) until re-authentication, addressing insufficient session expiration by preventing indefinite access.
Automatically terminating sessions after a defined period directly enforces session expiration, preventing indefinite session lifetimes that attackers can exploit.
Re-authentication after inactivity or time-based triggers prevents indefinite use of potentially hijacked or stale sessions.
Terminating sessions and network connections upon completion prevents insufficient session expiration.
Directly enforces termination of network sessions after inactivity or end-of-session, preventing indefinite session lifetime.
Consistent clocks across systems allow session expiration and timeout enforcement to function as intended in distributed environments.
When the non-persistent artifact is a session or connection, mandatory termination implements the missing expiration that CWE-613 describes.
Timed refresh of session-related information or on-demand generation plus deletion implements proper session expiration.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The CVE describes a predictable session identifier flaw in a public-facing WebSocket service that directly enables session hijacking/shadowing for unauthorized authentication (T1078 Valid Accounts) and remote service session hijacking (T1563). Exploitation occurs over the network against an exposed management system without authentication, mapping to T1190 Exploit Public-Facing Application. The DoS aspect is secondary and less directly tied to a single technique.
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…
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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-2026-27764 is a vulnerability in the WebSocket backend of a charging station management system, where session association relies on charging station identifiers but permits multiple endpoints to connect using the same session identifier. This design flaw produces predictable session identifiers, facilitating session hijacking or shadowing. In such attacks, the most recent connection overrides the legitimate charging station, intercepting backend commands intended for it. The issue is classified under CWE-613 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).
The vulnerability is exploitable over the network by unauthenticated attackers with low complexity. An adversary can connect using a known or predictable session identifier to displace a legitimate charging station, enabling unauthorized authentication as other users or interception of sensitive commands. Alternatively, a malicious actor can overwhelm the backend with valid session requests, triggering a denial-of-service condition.
Advisories provide guidance on mitigation, including details in CISA ICSA-26-062-06 at https://www.cisa.gov/news-events/ics-advisories/icsa-26-062-06, the corresponding CSAF JSON file at https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-062-06.json, and vendor support resources at https://mobiliti.hu/emobilitas/ugyfeltamogatas/ugyfelszolgalat.
Details
- CWE(s)