Toshiba printers use XML communication for the API endpoint provided by the printer. For the endpoint, XML parsing library is used and it is vulnerable to a time-based blind XML External Entity (XXE) vulnerability. An attacker can DoS the printers by sending a HTTP request without authentication. An attacker can exploit the XXE to retrieve information. As for the affected products/models/versions, see the reference URL.
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Workaround:
The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.