CVE-2026-20882

High

Published: 06 March 2026

Published

06 March 2026

Modified

05 May 2026

KEV Added

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Patch

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CVSS Score 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Score 0.0009 25.0th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-20882 is a high-severity Improper Restriction of Excessive Authentication Attempts (CWE-307) vulnerability in Mvm Mobiliti E-Mobi.Hu. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Brute Force (T1110); ranked at the 25.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense at a Glance

What attackers do: exploitation maps to Brute Force (T1110) and 1 other technique.

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.

AC-7 Unsuccessful Logon Attempts

addresses: CWE-307

This control directly enforces limits on consecutive invalid logon attempts and automatic response (e.g., lockout) to prevent brute-force exploitation of authentication mechanisms.

IA-10 Adaptive Authentication

addresses: CWE-307

Specific conditions can include excessive failed attempts, triggering stronger authentication that restricts brute-force exploitation.

MITRE ATT&CK Enterprise TechniquesAI

T1110 Brute Force Credential Access

Adversaries may use brute force techniques to gain access to accounts when passwords are unknown or when password hashes are obtained.

attack.mitre.org →

T1499.003 Application Exhaustion Flood Impact

Adversaries may target resource intensive features of applications to cause a denial of service (DoS), denying availability to those applications.

attack.mitre.org →

Why these techniques?

Lack of rate limiting on auth requests directly enables brute-force credential access (T1110) and application exhaustion DoS via flooding (T1499.003).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

The WebSocket Application Programming Interface lacks restrictions on the number of authentication requests. This absence of rate limiting may allow an attacker to conduct denial-of-service attacks by suppressing or mis-routing legitimate charger telemetry, or conduct brute-force attacks to gain unauthorized…

access.

Deeper analysisAI

CVE-2026-20882, published on 2026-03-06, is a vulnerability in the WebSocket Application Programming Interface that lacks restrictions on the number of authentication requests due to the absence of rate limiting. This flaw, mapped to CWE-307 (Improper Restriction of Excessive Authentication Attempts) and scored 7.5 under CVSS v3.1 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), affects components handling charger telemetry in operational technology environments.

Unauthenticated remote attackers can exploit this vulnerability over the network with low complexity and no user interaction. Successful exploitation enables denial-of-service attacks by flooding the interface with authentication requests, suppressing or mis-routing legitimate charger telemetry data, or facilitates brute-force attacks to achieve unauthorized access.

Mitigation guidance is detailed in related advisories, including CISA ICSA-26-062-06 (https://www.cisa.gov/news-events/ics-advisories/icsa-26-062-06), the corresponding CSAF JSON file (https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-062-06.json), and vendor support resources such as https://mobiliti.hu/emobilitas/ugyfeltamogatas/ugyfelszolgalat.