Unauthenticated Denial of Service (DoS) via malformed PJL request affecting multiple models from Brother Industries, Ltd, FUJIFILM Business Innovation, and Ricoh.
Vulnerability Description
An unauthenticated attacker who can connect to TCP port 9100 can issue a Printer Job Language (PJL) command that will crash the target device. The device will reboot, after which the attacker can reissue the command to repeatedly crash the device. A malformed PJL variable FORMLINES is set to a non number value causing the target to crash.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Stephen Fewer, Principal Security Researcher at Rapid7
References
- https://support.brother.com/g/b/link.aspx?prod=group2&faqid=faq00100846_000
- https://www.fujifilm.com/fbglobal/eng/company/news/notice/2025/0625_announce.html
- https://www.ricoh.com/products/security/vulnerabilities/vul?id=ricoh-2025-000007
- https://www.rapid7.com/blog/post/multiple-brother-devices-multiple-vulnerabilities-fixed
- https://assets.contentstack.io/v3/assets/blte4f029e766e6b253/blt6495b3c6adf2867f/685aa980a26c5e2b1026969c/vulnerability-disclosure-whitepaper.pdf
- https://github.com/sfewer-r7/BrotherVulnerabilities
More from Brother Industries, Ltd
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Brother Industries, Ltd
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Timeline
CVSS Vectors
Weaknesses (CWE)
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.