CVE-2025-8452
MEDIUMDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 15% of all known CVEs.
References
Related Vulnerabilities
Other CWE-538 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-51977 | Medium | 5.3 | 78% | - | - |
| CVE-2019-6851 | High | 7.5 | 30% | - | - |
| CVE-2017-9947 | Medium | 5.3 | 7.3% | - | Fix |
| CVE-2018-11798 | Medium | 6.5 | 4.9% | - | Fix |
| CVE-2017-16770 | Medium | 6.5 | 1.8% | - | Fix |
| CVE-2018-10590 | High | 7.5 | 1.7% | - | Fix |
Common questions
How do I fix CVE-2025-8452?
No published fix for CVE-2025-8452 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2025-8452 being actively exploited?
Not that we know of. CVE-2025-8452 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.24% is the estimated probability that it will be exploited in the next 30 days. That is higher than 15% of all scored CVEs.
How severe is CVE-2025-8452?
CVE-2025-8452 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-08.