CVE-2025-55704VulnerabilityPublished 29 Jan 2026

CVE-2025-55704: Brother Industries Multiple MFPs · Hidden Functionality

Affects Brother Industries Multiple MFPsSource CVE Database V5

Not known to be exploited · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 08:30 UTC

CVSS 3.1 base score

5.3Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 20% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
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: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
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: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: None: There is no loss of integrity within 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 29 Jan 2026
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

Affected software

Product	Affected	Fixed in
Brother Industries, Ltd.Multiple MFPs	Affected =see the information provided by the vendor	Fixed in–
Konica Minolta, Inc.Multiple MFPs	Affected =see the information provided by the vendor	Fixed in–

AI-suggested

To mitigate CVE-2025-55704, organizations should first monitor vendor communications closely for official patches or firmware updates addressing the hidden functionality issue. Until patches are available, network segmentation should be implemented to isolate MFP devices from untrusted networks and restrict access to management interfaces via firewalls or access control lists. Disable any unnecessary or undocumented features on the devices if possible, and audit device configurations regularly to detect unauthorized changes. Employ network monitoring and intrusion detection systems to identify suspicious access attempts to MFP logs or management ports. Additionally, enforce strict physical security controls to prevent local exploitation. Organizations should also consider replacing or upgrading devices that cannot be patched in a timely manner. Finally, ensure that logging and monitoring policies account for potential information leakage from MFPs and integrate these devices into broader security incident response plans.

Description

CVE-2025-55704 is a medium-severity vulnerability affecting multiple Brother Industries MFPs, involving hidden functionality that allows attackers to access device logs containing sensitive information. The flaw can be exploited remotely without authentication or user interaction, potentially exposing confidential data stored in logs. Although no known exploits are currently in the wild, the vulnerability's network accessibility and low attack complexity pose a risk to organizations using affected devices. European organizations relying on Brother MFPs for document management and printing could face information disclosure risks, impacting privacy and compliance. Mitigation requires vendor patches once available and restricting network access to MFP management interfaces. Countries with high adoption of Brother MFPs in critical sectors, such as Germany, France, and the UK, are most likely to be affected. Due to the limited impact on integrity and availability, and no authentication required, the severity is medium. Defenders should prioritize monitoring network access to MFPs and prepare for patch deployment to reduce exposure.

Impact

For European organizations, the primary impact of CVE-2025-55704 is the potential unauthorized disclosure of sensitive information contained within MFP logs. This could include user activity logs, network configurations, or other operational data that may aid attackers in planning further intrusions or compromising privacy. Such data leakage could undermine compliance with GDPR and other data protection regulations, leading to legal and reputational consequences. While the vulnerability does not directly affect device integrity or availability, the exposure of sensitive logs can weaken overall security posture. Organizations in sectors with stringent data confidentiality requirements—such as finance, healthcare, and government—are particularly at risk. Additionally, since the vulnerability can be exploited remotely without authentication, attackers could leverage it as an initial foothold or intelligence source within corporate networks. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as threat actors often develop exploits post-disclosure.

Summary

CVE-2025-55704 is a vulnerability identified in multiple multifunction printers (MFPs) manufactured by Brother Industries, Ltd. The issue stems from hidden functionality within the affected devices that permits an attacker to remotely retrieve device logs without requiring authentication or user interaction. These logs may contain sensitive information, such as configuration details, user activity, or network data, which could be leveraged for further attacks or information gathering. The vulnerability is exploitable over the network (AV:N), with low attack complexity (AC:L), and does not require privileges (PR:N) or user interaction (UI:N). The scope is unchanged (S:U), and the impact is limited to confidentiality (C:L), with no impact on integrity or availability. The CVSS 3.1 base score is 5.3, categorizing it as medium severity. No known exploits have been reported in the wild, and specific affected versions are to be confirmed via vendor advisories. The vulnerability highlights a design oversight where hidden or undocumented features expose sensitive data, emphasizing the need for secure device management and firmware validation. Given the widespread use of Brother MFPs in enterprise and government environments, this vulnerability could facilitate reconnaissance or data leakage if exploited.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Feb 2026, 08:53 UTC

Technical details

References

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