By using the "uscan" protocol provided by the eSCL specification, an attacker can discover the serial number of multi-function printers that implement the Brother-provided firmware. This serial number can, in turn, can be leveraged by the flaw described by CVE-2024-51978 to calculate the default administrator password. This flaw is similar to CVE-2024-51977, with the only difference being the protocol by which an attacker can use to learn the remote device's serial number. The eSCL/uscan vector is typically only exposed on the local network. Any discovery service that implements the eSCL specification can be used to exploit this vulnerability, and one such implementation is the runZero Explorer. Changing the default administrator password will render this vulnerability virtually worthless, since the calculated default administrator password would no longer be the correct password.
| Version | Base score | Base severity | Vector |
|---|
| Hyperlink | Resource Type |
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By using the "uscan" protocol provided by the eSCL specification, an attacker can discover the serial number of multi-function printers that implement the Brother-provided firmware. This serial number can, in turn, can be leveraged by the flaw described by CVE-2024-51978 to calculate the default administrator password. This flaw is similar to CVE-2024-51977, with the only difference being the protocol by which an attacker can use to learn the remote device's serial number. The eSCL/uscan vector is typically only exposed on the local network. Any discovery service that implements the eSCL specification can be used to exploit this vulnerability, and one such implementation is the runZero Explorer. Changing the default administrator password will render this vulnerability virtually worthless, since the calculated default administrator password would no longer be the correct password.
| Version | Base score | Base severity | Vector |
|---|---|---|---|
| 3.1 | 4.3 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| CAPEC ID | Description |
|---|
Changing the default administrator password will render this vulnerability virtually worthless, since the calculated default administrator password (as described in the related vulnerability, CVE-2025-51978) would no longer be the correct password.
Any discovery service that implements the eSCL specification can be used to exploit this vulnerability. One such implementation is the runZero Explorer, described at https://help.runzero.com/docs/installing-an-explorer/ .
| Event | Date |
|---|
| Hyperlink | Resource |
|---|---|
| https://support.brother.com/g/b/faqend.aspx?c=us&lang=en&prod=group2&faqid=faq00100851_000 | vendor-advisory |
| https://www.rapid7.com/blog/post/multiple-brother-devices-multiple-vulnerabilities-fixed/ | third-party-advisory related |
| https://help.runzero.com/docs/installing-an-explorer/ | exploit |
| https://takeonme.org/gcves/GCVE-1337-2025-00000000000000000000000000000000000000000000000001011111011111010111111001000000000000000000000000000000000000000000000000000000001 | technical-description third-party-advisory |
| Version | Base score | Base severity | Vector |
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| CAPEC ID | Description |
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| Event | Date |
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| Hyperlink | Resource |
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By using the "uscan" protocol provided by the eSCL specification, an attacker can discover the serial number of multi-function printers that implement the Brother-provided firmware. This serial number can, in turn, can be leveraged by the flaw described by CVE-2024-51978 to calculate the default administrator password. This flaw is similar to CVE-2024-51977, with the only difference being the protocol by which an attacker can use to learn the remote device's serial number. The eSCL/uscan vector is typically only exposed on the local network. Any discovery service that implements the eSCL specification can be used to exploit this vulnerability, and one such implementation is the runZero Explorer. Changing the default administrator password will render this vulnerability virtually worthless, since the calculated default administrator password would no longer be the correct password.
| Date Added | Due Date | Vulnerability Name | Required Action |
|---|---|---|---|
| N/A |
| Type | Version | Base score | Base severity | Vector |
|---|---|---|---|---|
| Secondary | 3.1 | 4.3 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
An unauthenticated attacker who can access either the HTTP service (TCP port 80), the HTTPS service (TCP port 443), or the IPP service (TCP port 631), can leak several pieces of sensitive information from a vulnerable device. The URI path /etc/mnt_info.csv can be accessed via a GET request and no authentication is required. The returned result is a comma separated value (CSV) table of information. The leaked information includes the device’s model, firmware version, IP address, and serial number.