CVE-2025-55704Network attack vector

Device impersonation via exposed log authentication data

Published Jan 29, 2026 · Updated Jan 29, 2026

Hidden functionality in multiple Brother MFPs allows remote attackers to retrieve device logs containing sensitive information. The problem-analysis log function exposes authentication information that can be reused to impersonate a device to Brother Online Services. No privileges or user interaction are required; resulting access is limited to service data such as registered-device usage and ink levels.

CVSS severity6.9
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hidden functionality in multiple Brother MFPs allows remote attackers to retrieve device logs containing sensitive information. The problem-analysis log function exposes authentication information that can be reused to impersonate a device to Brother Online Services. No privileges or user interaction are required; resulting access is limited to service data such as registered-device usage and ink levels.

The record

CVE
CVE-2025-55704
Published
Jan 29, 2026
Updated
Jan 29, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-912, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.9JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
5.3JPCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-912Hidden Functionality
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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