CVE-2026-27027: Charging Station Information Disclosure

CVE-2026-27027 Overview

CVE-2026-27027 is an information exposure vulnerability affecting electric vehicle (EV) charging infrastructure. The vulnerability exists because charging station authentication identifiers are publicly accessible via web-based mapping platforms, potentially allowing unauthorized access to sensitive authentication credentials. This weakness falls under CWE-522 (Insufficiently Protected Credentials), indicating that authentication data is not adequately secured from exposure.

Critical Impact
Exposed authentication identifiers on public mapping platforms could enable attackers to harvest credentials for EV charging stations, potentially leading to unauthorized charging sessions, billing fraud, or disruption of charging infrastructure.

Affected Products

EV Charging Stations with Web-Based Mapping Integration
Charging Station Management Platforms
Associated Authentication Systems

Discovery Timeline

2026-03-06 - CVE-2026-27027 published to NVD
2026-03-10 - Last updated in NVD database

Technical Details for CVE-2026-27027

Vulnerability Analysis

This vulnerability represents a significant information disclosure issue within EV charging infrastructure. The core problem lies in the improper handling of authentication identifiers, which are inadvertently exposed through publicly accessible web-based mapping platforms. When charging station operators integrate their systems with mapping services to help users locate stations, the implementation fails to properly sanitize or protect authentication-related data before transmission.

The vulnerability enables unauthenticated remote attackers to access sensitive authentication identifiers without requiring any special privileges or user interaction. This exposure can lead to unauthorized access to charging station management interfaces, potential manipulation of charging sessions, and broader attacks against the charging infrastructure ecosystem.

Root Cause

The root cause of CVE-2026-27027 is insufficiently protected credentials (CWE-522). The charging station systems fail to implement proper access controls and data sanitization when transmitting station information to web-based mapping platforms. Authentication identifiers that should remain confidential are included in public-facing data feeds, making them accessible to anyone who queries the mapping service.

Attack Vector

The attack vector for this vulnerability is network-based with low attack complexity. An attacker can exploit this vulnerability remotely by:

Querying public web-based mapping platforms that display charging station information
Extracting authentication identifiers from the publicly accessible data
Using harvested credentials to attempt unauthorized access to charging station systems

The vulnerability requires no authentication, no user interaction, and can be exploited with minimal technical sophistication. The exposure of authentication identifiers could be used as a stepping stone for more sophisticated attacks against charging infrastructure or individual user accounts.

Detection Methods for CVE-2026-27027

Indicators of Compromise

Unusual query patterns against mapping platform APIs requesting charging station data
Unauthorized authentication attempts using valid station identifiers from unexpected sources
Anomalous access patterns to charging station management interfaces
Multiple failed or successful authentication attempts from geographically dispersed locations using the same credentials

Detection Strategies

Monitor API access logs for bulk data retrieval requests targeting charging station information
Implement rate limiting and anomaly detection on mapping platform integrations
Deploy authentication monitoring to detect credential abuse from unauthorized sources
Audit charging station configurations to identify exposed authentication parameters

Monitoring Recommendations

Establish baseline traffic patterns for mapping platform integrations and alert on deviations
Implement logging for all authentication attempts against charging infrastructure
Monitor for unauthorized charging sessions or billing anomalies that may indicate credential theft
Review mapping platform data feeds periodically to ensure no sensitive data is exposed

How to Mitigate CVE-2026-27027

Immediate Actions Required

Audit all charging station integrations with web-based mapping platforms for exposed authentication data
Remove or redact authentication identifiers from publicly accessible data feeds immediately
Rotate any potentially compromised authentication credentials
Implement access controls to limit what data is shared with mapping services

Patch Information

Organizations should consult the CISA ICS Advisory for specific vendor guidance and remediation steps. Additional technical details are available in the GitHub CSAF Resource. Contact the charging station vendor directly for firmware updates or configuration guidance that addresses this vulnerability.

Workarounds

Disable or restrict mapping platform integrations until authentication data exposure is resolved
Implement API gateways or proxy services that filter sensitive data before transmission to mapping platforms
Deploy network segmentation to isolate charging station management systems from public-facing services
Enable multi-factor authentication for charging station management interfaces to reduce impact of credential exposure

bash

# Configuration example - Review and sanitize data shared with mapping platforms
# Ensure authentication identifiers are excluded from public API responses
# Example: Configure data filtering in your charging station management system
# Check mapping integration settings and remove sensitive fields from exports
# Enable audit logging for all authentication and data access events