CVE-2023-41963Network attack vector

Unauthenticated HMI shutdown via crafted FTP packets

Published Dec 12, 2023 · Updated Aug 2, 2024

Resource-consumption flaw in the GC-A2 series FTP service allows remote attackers to stop the HMI with crafted network packets. JTEKT identifies uncontrolled resource consumption in the FTP service but does not disclose which packet field or processing path exhausts resources. No authentication or user interaction is required; a successful attack stops the HMI until it is restarted.

CVSS severity7.5
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-consumption flaw in the GC-A2 series FTP service allows remote attackers to stop the HMI with crafted network packets. JTEKT identifies uncontrolled resource consumption in the FTP service but does not disclose which packet field or processing path exhausts resources. No authentication or user interaction is required; a successful attack stops the HMI until it is restarted.

The record

CVE
CVE-2023-41963
Published
Dec 12, 2023
Updated
Aug 2, 2024
Vendor
JTEKT ELECTRONICS CORPORATION
Product
GC-A25
Classifications
CWE-400, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 12, 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=all versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JTEKT ELECTRONICS CORPORATION · GC-A25version=all versions
JTEKT ELECTRONICS CORPORATION · GC-A26-J2version=all versions
JTEKT ELECTRONICS CORPORATION · GC-A24W-C(W)version=all versions
JTEKT ELECTRONICS CORPORATION · GC-A28-Cversion=all versions
JTEKT ELECTRONICS CORPORATION · GC-A27-Cversion=all versions
JTEKT ELECTRONICS CORPORATION · GC-A22W-CWversion=all versions
JTEKT ELECTRONICS CORPORATION · GC-A26W-C(W)version=all versions
JTEKT ELECTRONICS CORPORATION · GC-A24-Mversion=all versions
JTEKT ELECTRONICS CORPORATION · GC-A26version=all versions
JTEKT ELECTRONICS CORPORATION · GC-A24version=all versions

Published CVSS scores

7.8JTEKT ELECTRONICS CORPORATIONAV:N/AC:L/Au:N/C:N/I:N/A:C
7.5JTEKT ELECTRONICS CORPORATIONCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 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-400Uncontrolled Resource Consumption
T0814Denial 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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