CVE-2026-31903Network attack vector

Unauthenticated service interruption via unlimited authentication requests

Published Mar 20, 2026 · Updated Mar 20, 2026

Authentication rate limiting failure in IGL-Technologies eParking.fi affects all versions and allows remote attackers to interrupt charger telemetry. The WebSocket API accepts an unrestricted number of authentication requests, enabling brute-force attempts or request floods that suppress or misroute legitimate charger messages. No credentials or user interaction are required, but encrypted OCPP deployments and devices using the proprietary eTolppa protocol are not affected.

CVSS severity8.7
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication rate limiting failure in IGL-Technologies eParking.fi affects all versions and allows remote attackers to interrupt charger telemetry. The WebSocket API accepts an unrestricted number of authentication requests, enabling brute-force attempts or request floods that suppress or misroute legitimate charger messages. No credentials or user interaction are required, but encrypted OCPP deployments and devices using the proprietary eTolppa protocol are not affected.

The record

CVE
CVE-2026-31903
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
IGL-Technologies
Product
eParking.fi
Classifications
CWE-307, CAPEC-652, CAPEC-560, CAPEC-16, CAPEC-653, CAPEC-600, CAPEC-565, CAPEC-49, T0814, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IGL-Technologies · eParking.fiversion=All versions

Published CVSS scores

8.7ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
CAPEC-652Use of Known Kerberos Credentials
CAPEC-560Use of Known Domain Credentials
CAPEC-16Dictionary-based Password Attack
CAPEC-653Use of Known Operating System Credentials
CAPEC-600Credential Stuffing
CAPEC-565Password Spraying
CAPEC-49Password Brute Forcing
T0814Denial of Service
T1110Brute Force

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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