Vulnerability in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP (CVE-2026-8806)
Summary
Vulnerability in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP (CVE-2026-8806). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
Expected Behavior Violation vulnerability in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module FX5-ENET/IP all versions allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by continuously sending a large number of communication packets to the Ethernet port of the product in a short period of time, increasing the processing load of the product, preventing the internal anomaly-detection processing from being performed, and causing the communication function to stop.
Source: CISA ICS Advisories NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-8806 has been found in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP CVE-2026-8806" on the vendor's site.
CVE-2026-8806 (Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP) — CWE-440
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-440) exists in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP.
Check the vendor advisory for the affected versions of Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。