CVE-2023-50707Network attack vector

Authenticated service interruption via crafted session requests

Published Dec 19, 2023 · Updated Aug 2, 2024

Uncontrolled resource consumption in Efacec BCU 500 4.07 allows remote authenticated users to interrupt the device via crafted requests. Public advisories identify active user sessions and custom requests but do not disclose the affected endpoint, resource, or missing limit. An active authenticated session is required; exploitation exhausts device resources and interrupts bay-controller availability, while the exact failure mode is undisclosed.

CVSS severity9.6
Critical
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Efacec BCU 500 4.07 allows remote authenticated users to interrupt the device via crafted requests. Public advisories identify active user sessions and custom requests but do not disclose the affected endpoint, resource, or missing limit. An active authenticated session is required; exploitation exhausts device resources and interrupts bay-controller availability, while the exact failure mode is undisclosed.

The record

CVE
CVE-2023-50707
Published
Dec 19, 2023
Updated
Aug 2, 2024
Vendor
Efacec
Product
BCU 500
Classifications
CWE-400, T0814
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=version 4.07

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Efacec · BCU 500version=version 4.07

Published CVSS scores

9.6ICS-CERTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
7.5NIST NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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