What is the CVSS score of CVE-2026-27764?

CVE-2026-27764 has a CVSS 4.0 base score of 6.9 (Medium). CVSS 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. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-27764?

Within 24 hours: Identify and inventory all systems using the affected WebSocket backend and assess exposure scope; enable enhanced logging for WebSocket connections. Within 7 days: Implement network segmentation to restrict WebSocket endpoint access and deploy WAF rules to validate session identifiers; conduct internal audit for signs of exploitation. Within 30 days: Work with vendor on patch timeline; evaluate alternative charging station management solutions; implement multi-factor authentication for administrative access to charging infrastructure.

Mobiliti E Mobi Hu CVE-2026-27764

MEDIUM

Insufficient Session Expiration (CWE-613)

2026-03-06 ics-cert@hq.dhs.gov

Authentication Bypass Mobiliti E Mobi Hu Mvm

6.9

CVSS 4.0 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Predict charging station session identifier
Exploit

Connect WebSocket with same identifier
Execution

Displace legitimate station connection
Impact

Receive backend commands intended for target station

Vulnerability Assessment

Weakness	CWE CWE-613 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V7 - Session Management Session expiration enforcement
Exploitation Conditions	WebSocket backend accepting multiple connections with identical charging station identifiers without validation or rate limiting. No authentication required; default configuration allows remote session shadowing attacks against any connected charging station.
Impact	CVSS 7.3 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitation no authentication required.
Exploit ScenarioDerived	An attacker without authentication could exploit this vulnerability to authenticate as other users or enable a malicious actor to cause a denial-of-ser.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

WebSocket session handling in charging station backends allows multiple connections to use identical session identifiers, enabling attackers to hijack active sessions and impersonate legitimate stations without authentication. An adversary can intercept backend commands intended for a target charging station or launch denial-of-service attacks by flooding the backend with spoofed session requests. This vulnerability affects any system relying on this WebSocket implementation and currently lacks an available patch.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:06 CVSS 7.3

The WebSocket backend uses charging station identifiers to uniquely associate sessions but allows multiple endpoints to connect using the same session identifier. [CVSS 7.3 HIGH]

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-613 (Insufficient Session Expiration). 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 malicio

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.9 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Vulnerable system: Confidentiality

Low

Vulnerable system: Integrity

Low

Vulnerable system: Availability

Low

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

Severity Changed

May 05, 2026 - 19:07 NVD

HIGH MEDIUM

CVSS changed

May 05, 2026 - 19:07 NVD

7.3 (HIGH) 6.9 (MEDIUM)

CVE Published

Mar 06, 2026 - 16:16 nvd

HIGH 7.3

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

CVE-2026-27764 allows attackers to hijack charging station sessions by exploiting weak session identifier validation in the WebSocket backend, potentially enabling unauthorized access to critical infrastructure and customer data. This vulnerability affects any organization operating connected charging stations and requires immediate mitigation to prevent service disruption and data compromise.

Business Impact: High

Compensating Controls

Implement Web Application Firewall (WAF) rules to enforce single endpoint-per-session binding; use network segmentation to isolate WebSocket traffic and restrict client IP ranges; disable WebSocket feature if not business-critical; implement rate limiting on session establishment; enforce mutual TLS (mTLS) authentication for all WebSocket connections; deploy real-time monitoring and alerting for duplicate session identifiers; rotate session tokens frequently with short expiration windows.

Threat Intelligence Overview

EPSS Score

0.0%

Top 86% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.