CVE-2024-51978: Authentication bypass via default password generation affecting multiple models from Brother Industries, Ltd, Toshiba Tec, and Konica Minolta, Inc.

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of 29 Oct 2026.

VulnCheck KEV lists it since 6 Aug 2025. It cites 1 public report, the first from 6 Aug 2025.

• app.crowdsec.net

How likely is exploitation in the next 30 days?

15.8%

EPSS score, percentile 96.9 of all scored records. A probability estimated by FIRST, not a report of exploitation.

CISA's SSVC assessment in the CVE record lists exploitation as poc.

How severe?

9.8 Critical

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (5)

Which versions are affected?

Affected

• 1.0 through 1.03(B)
• 1.0 through 1.13(H)
• 1.0 through 1.02(B)
• 1.0 through 1.38(M)
• 1.0 through 1.38(M)
• 1.0 through 1.25(J)

and 14 more in the table below

Versions by product

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; VulnCheck KEV, as of 30 Oct 2026; FIRST EPSS, as of 30 Oct 2026; CVE List, as of 30 Oct 2026. About the data.

Description

Authentication bypass via default password generation affecting multiple models from Brother Industries, Ltd, Toshiba Tec, and Konica Minolta, Inc.

An unauthenticated attacker who knows the target device's serial number, can generate the default administrator password for the device. An unauthenticated attacker can first discover the target device's serial number via CVE-2024-51977 over HTTP/HTTPS/IPP, or via a PJL request, or via an SNMP request.

Source: CVE List, as of 30 Oct 2026. About the data.

What to do

Advisories and patches

• support.brother.com (Vendor advisory)
• support.brother.com (Vendor advisory)
• support.brother.com (Vendor advisory)
• toshibatec.com (Vendor advisory)
• konicaminolta.com (Vendor advisory)

This summary is based on the CVE record as of 30 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Source: CVE List, as of 30 Oct 2026. About the data.

Timeline