CVE-2026-20792
Published: 27 February 2026
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 misrouting legitimate charger telemetry, or conduct brute-force attacks to gain unauthorized…
more
access.
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.
This control directly enforces limits on consecutive invalid logon attempts and automatic response (e.g., lockout) to prevent brute-force exploitation of authentication mechanisms.
Specific conditions can include excessive failed attempts, triggering stronger authentication that restricts brute-force exploitation.
Security SummaryAI
CVE-2026-20792 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. Published on 2026-02-27, it is associated with systems handling charger telemetry and is documented in CISA's ICS advisory ICSA-26-057-05, ChargeMap support resources, and related CSAF files. The issue corresponds to CWE-307 (Improper Restriction of Excessive Authentication Attempts) and carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Remote attackers require no privileges or user interaction and can exploit the vulnerability over the network with low attack complexity. Successful exploitation enables denial-of-service attacks by suppressing or misrouting legitimate charger telemetry data, or brute-force attacks to gain unauthorized access to the system.
Mitigation details are provided in the referenced advisories, including CISA's ICSA-26-057-05 at https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-05, the corresponding CSAF JSON file at https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-05.json, and ChargeMap support at https://chargemap.com/en-us/support.
Details
- CWE(s)
Affected Products
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Missing rate limiting on auth requests directly enables brute-force credential access (T1110) and DoS via request flooding on the service endpoint (T1499).