HIGH CWE-190
CVE-2026-8805
Denial-of-service (DoS) vulnerability in MELSEC iQ-F Series EtherNet/IP module
Mitsubishi Electric·MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIP
8.7/ 10
CVSS 4.0
High severity
0.64%
EPSS exploit odds
Chance of exploitation in the next 30 days
Higher than 51% of all CVEs
Not listed
CISA KEV catalog
No confirmed in-the-wild exploitation on CISA's list.
Timeline
- Published
- Jun 19, 2026
- Updated
- Jun 22, 2026
- First covered
- Jun 29, 2026
- Latest story
- 5 months ago
Summary
Integer Overflow or Wraparound vulnerability in the EtherNet/IP function of Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP module FX5-EIP versions 1.000 and prior allows a remote attacker to cause a denial-of-service (DoS) condition in the affected product by rapidly establishing a large number of TCP connections to it, resulting in an inconsistency in the product's internal connection management process and triggering improper memory access.
CWE-190Integer Overflow or Wraparound
Attack profile
Attack vectorNetwork
ComplexityLow
RequirementsNone
PrivilegesNone
User interactionNone
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NAffected products
- Mitsubishi Electric MELSEC iQ-F Series FX5-EIP EtherNet/IP Module FX5-EIPversions 1.000 and prior