CVE-2025-54777

Web interface denial of service via uncaught exception

Published Aug 29, 2025 · Updated Aug 29, 2025

An uncaught exception in Konica Minolta bizhub firmware allows remote attackers to stop Web Connection via a malformed S/MIME certificate. The S/MIME Email Destination certificate-import path processes malformed certificate data without catching the resulting exception, leaving Web Connection completely unresponsive. Attackers need adjacent-network access and the ability to register or change an email destination; other multifunction-printer functions remain available.

CVSS severity5.3
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An uncaught exception in Konica Minolta bizhub firmware allows remote attackers to stop Web Connection via a malformed S/MIME certificate. The S/MIME Email Destination certificate-import path processes malformed certificate data without catching the resulting exception, leaving Web Connection completely unresponsive. Attackers need adjacent-network access and the ability to register or change an email destination; other multifunction-printer functions remain available.

The record

CVE
CVE-2025-54777
Published
Aug 29, 2025
Updated
Aug 29, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-248, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 29, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3JPCERT/CCCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
4.3JPCERT/CCCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-248Uncaught Exception
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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