Cyber Resilience

CVE-2026-8806

High

Published: 19 June 2026

Published
19 June 2026
Modified
22 June 2026
KEV Added
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Patch
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CVSS Score v4 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0037 28.6th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-8806 is a high-severity Expected Behavior Violation (CWE-440) vulnerability in Jvn (inferred from references). Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Direct Network Flood (T1498.001); ranked at the 28.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

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.

CWE(s)
CWE-440

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1498.001 Direct Network Flood Impact
Adversaries may attempt to cause a denial of service (DoS) by directly sending a high-volume of network traffic to a target.
attack.mitre.org →
T1499.002 Service Exhaustion Flood Impact
Adversaries may target the different network services provided by systems to conduct a denial of service (DoS).
attack.mitre.org →
Why these techniques?

Vulnerability description explicitly details remote packet flooding to exhaust device resources and induce service/communication failure, directly mapping to network and service exhaustion DoS subtechniques.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

Jvn
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inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-6 Security and Privacy Function Verification
addresses: CWE-440

Verification of security function operation directly detects deviations from expected behavior.

References