VulnerabilityPublished 17 Sep 2025

CVE-2025-55075: I-O DATA DEVICE WN-7D36QR · Hidden Functionality

Affects I-O DATA DEVICE WN-7D36QRSource CVE Database V5

Not known to be exploited · CVSS 4.9 Medium.

Data as of 26 Oct 2026, 09:15 UTC

CVSS 3.1 base score

4.9Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: High: The attacker is authorized with (i.e., requires) privileges that provide significant (e.g., administrative) control over the vulnerable component that could affect component-wide settings and files.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

To mitigate this vulnerability effectively, European organizations should first identify any deployments of the affected WN-7D36QR and WN-7D36QR/UE devices running firmware version 1.1.3 or earlier. Immediate steps include restricting administrative access to these devices to trusted personnel and networks only, employing strong authentication mechanisms such as multi-factor authentication to reduce the risk of credential compromise. Network segmentation should be enforced to isolate these devices from sensitive network segments. Monitoring network traffic for unusual SSH activity or unexpected port openings can help detect exploitation attempts. Since no patches are currently linked, organizations should engage with I-O DATA DEVICE, INC. to obtain firmware updates or advisories. If possible, disabling any undocumented or hidden services, including SSH, through device configuration is recommended. Regularly auditing device configurations and access logs will help identify unauthorized changes. Finally, organizations should incorporate this vulnerability into their incident response plans, preparing to respond swiftly if exploitation is detected.

Description

Hidden functionality issue exists in WN-7D36QR and WN-7D36QR/UE. If this vulnerability is exploited, SSH may be enabled by a remote authenticated attacker.

Impact

For European organizations, the impact of this vulnerability could be significant, especially for those relying on the affected I-O DATA DEVICE routers in their network infrastructure. Enabling SSH access remotely by an attacker with existing credentials could allow unauthorized configuration changes, potentially weakening network security or enabling further exploitation. This could lead to integrity breaches, such as unauthorized firmware modifications or network traffic interception. Organizations in sectors with strict regulatory requirements around network security and data integrity, such as finance, healthcare, and critical infrastructure, may face compliance risks if such devices are compromised. Additionally, the ability to remotely enable SSH could facilitate lateral movement within corporate networks, increasing the risk of broader compromise. Although the vulnerability does not directly affect confidentiality or availability, the integrity impact and potential for escalation make it a concern for maintaining secure network operations. The requirement for prior authentication reduces the likelihood of opportunistic attacks but does not eliminate risk from insider threats or attackers who have already gained initial access through other means.

References

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 17 Sep 2025, 03:47 UTC

Technical details

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