CVE-2026-20792Network attack vector

Service disruption via unrestricted WebSocket authentication requests

Published Feb 26, 2026 · Updated Feb 26, 2026

Improper authentication-attempt restriction in Chargemap chargemap.com allows remote attackers to disrupt charger telemetry via its WebSocket API. The API accepts unlimited authentication requests without rate limiting, enabling request floods or repeated password guesses. No authentication or user interaction is required; abuse can suppress or misroute legitimate charger telemetry, while brute force can gain unauthorized access.

CVSS severity8.7
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication-attempt restriction in Chargemap chargemap.com allows remote attackers to disrupt charger telemetry via its WebSocket API. The API accepts unlimited authentication requests without rate limiting, enabling request floods or repeated password guesses. No authentication or user interaction is required; abuse can suppress or misroute legitimate charger telemetry, while brute force can gain unauthorized access.

The record

CVE
CVE-2026-20792
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
Chargemap
Product
chargemap.com
Classifications
CWE-307, T1110, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 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?

Chargemap · chargemap.comversion=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
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
T1110Brute Force
T1499Endpoint Denial of Service

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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