CVE-2023-1285Network attack vector

Modbus communication outage via signal-handler race

Published Apr 14, 2023 · Updated Feb 6, 2025

Signal handler race condition in GC-ENET-COM SN:16XXXXXXXXX allows remote attackers to interrupt Modbus TCP communication via UDP packets. A race between the interrupt service routine and extension-unit processing prevents Modbus requests from being handled during a crafted UDP packet flood. No authentication is required, but the unit must operate as a Modbus TCP Server; service remains unavailable until a power cycle or hot swap.

CVSS severity7.5
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Signal handler race condition in GC-ENET-COM SN:16XXXXXXXXX allows remote attackers to interrupt Modbus TCP communication via UDP packets. A race between the interrupt service routine and extension-unit processing prevents Modbus requests from being handled during a crafted UDP packet flood. No authentication is required, but the unit must operate as a Modbus TCP Server; service remains unavailable until a power cycle or hot swap.

The record

CVE
CVE-2023-1285
Published
Apr 14, 2023
Updated
Feb 6, 2025
Vendor
Mitsubishi Electric India Pvt. Ltd.
Product
GC-ENET-COM
Classifications
CWE-362, CWE-364, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=SN:16XXXXXXXXX

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mitsubishi Electric India Pvt. Ltd. · GC-ENET-COMversion=SN:16XXXXXXXXX

Published CVSS scores

5.9NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5Mitsubishi Electric India Pvt. Ltd.CVSS: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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-364Signal Handler Race Condition
T1499.002Service Exhaustion Flood

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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