Mitsubishi Electric MELSEC iQ-F FX5-ENET IP Ethernet Module FX5-ENET expected behavior violation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.5$0-$5k3.08

Summaryinfo

A vulnerability marked as critical has been reported in Mitsubishi Electric MELSEC iQ-F FX5-ENET IP Ethernet Module FX5-ENET and IP. This issue affects some unknown processing. The manipulation leads to expected behavior violation. This vulnerability is traded as CVE-2026-8806. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Mitsubishi Electric MELSEC iQ-F FX5-ENET IP Ethernet Module FX5-ENET and IP (the affected version is unknown) and classified as critical. This issue affects an unknown code. The manipulation with an unknown input leads to a expected behavior violation vulnerability. Using CWE to declare the problem leads to CWE-440. A feature, API, or function does not perform according to its specification. Impacted is availability. The summary by CVE is:

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.

It is possible to read the advisory at mitsubishielectric.com. The identification of this vulnerability is CVE-2026-8806 since 05/18/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Expected behavior violation
CWE: CWE-440 / CWE-436
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/18/2026 CVE reserved
06/19/2026 +32 days Advisory disclosed
06/19/2026 +0 days VulDB entry created
06/19/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: mitsubishielectric.com
Status: Confirmed

CVE: CVE-2026-8806 (🔒)
GCVE (CVE): GCVE-0-2026-8806
GCVE (VulDB): GCVE-100-372299

Entryinfo

Created: 06/19/2026 07:53
Changes: 06/19/2026 07:53 (62)
Complete: 🔍
Cache ID: 216::103

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