CWE-190 Integer Overflow or Wraparound in Mitsubishi Electric Corporation Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP (CVE-2026-8805)
CVE-2026-8805 is an integer overflow vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and earlier. A remote attacker can exploit this by rapidly establishing many TCP connections, causing a denial-of-service (DoS) condition due to improper memory access triggered by internal connection management inconsistencies.
AI Analysis
Technical Summary
This vulnerability involves an integer overflow or wraparound in the EtherNet/IP functionality of the Mitsubishi Electric MELSEC iQ-F Series FX5-EIP module, specifically in versions 1.000 and prior. The flaw allows a remote attacker with no privileges and no user interaction to cause a denial-of-service by rapidly opening numerous TCP connections. This leads to an inconsistency in the internal connection management process, resulting in improper memory access and service disruption.
Potential Impact
Successful exploitation results in a denial-of-service condition on the affected EtherNet/IP module, potentially disrupting industrial control communications. There is no indication of code execution or data disclosure. The impact is limited to service availability degradation.
Mitigation Recommendations
No patch or official fix is currently available for this vulnerability. Users should monitor the vendor advisory for updates regarding remediation. In the meantime, limiting exposure of the affected module to untrusted networks and controlling access to the EtherNet/IP interface may reduce risk.
CWE-190 Integer Overflow or Wraparound in Mitsubishi Electric Corporation Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP (CVE-2026-8805)
Description
CVE-2026-8805 is an integer overflow vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and earlier. A remote attacker can exploit this by rapidly establishing many TCP connections, causing a denial-of-service (DoS) condition due to improper memory access triggered by internal connection management inconsistencies.
CVSS v4.0
Score 8.7high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow or wraparound in the EtherNet/IP functionality of the Mitsubishi Electric MELSEC iQ-F Series FX5-EIP module, specifically in versions 1.000 and prior. The flaw allows a remote attacker with no privileges and no user interaction to cause a denial-of-service by rapidly opening numerous TCP connections. This leads to an inconsistency in the internal connection management process, resulting in improper memory access and service disruption.
Potential Impact
Successful exploitation results in a denial-of-service condition on the affected EtherNet/IP module, potentially disrupting industrial control communications. There is no indication of code execution or data disclosure. The impact is limited to service availability degradation.
Mitigation Recommendations
No patch or official fix is currently available for this vulnerability. Users should monitor the vendor advisory for updates regarding remediation. In the meantime, limiting exposure of the affected module to untrusted networks and controlling access to the EtherNet/IP interface may reduce risk.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- CISA
- Advisory Id
- ICSA-26-169-05
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a343a2df198dc38c148e513
Added to database: 06/18/2026, 18:34:21 UTC
Last enriched: 06/25/2026, 20:08:38 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 178
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.