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Incorrect Default PermissionsWeakness · CWE-276

CVE-2019-20458

HIGH · 8.8 CVSS v3.1 Published 2024-11-07
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
93/100
Remediation priority · Urgent
No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An issue was discovered on Epson Expression Home XP255 20.08.FM10I8 devices. By default, the device comes (and functions) without a password. The user is at no point prompted to set up a password on the device (leaving a number of devices without a password). In this case, anyone connecting to the web admin panel is capable of becoming admin without using any credentials.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The Epson Expression Home XP255 printer with firmware 20.08.FM10I8 ships with no default password for its web admin panel and provides no prompt or mechanism for users to set one. This allows any network-connected attacker to access the administrative interface without authentication and gain full admin control of the device.

MitigationAccess the printer's web admin panel or control panel and configure a strong administrator password to prevent unauthenticated access; consider disabling remote web management if not required.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the printer model
    Access the printer's web admin panel by entering its IP address in a browser, or check the model name printed on the device or in its documentation
    Affected if The device is an Epson Expression Home XP255
  2. Check the firmware version
    In the web admin panel, navigate to the firmware or status section to view the installed version; alternatively, print a network configuration or status page from the printer control panel
    Affected if The firmware version is 20.08.FM10I8
  3. Verify web admin panel access
    Open a web browser and navigate to the printer's IP address on ports 80 or 443; attempt to access the administrative interface without entering any credentials
    Affected if The admin interface loads and displays full configuration options without prompting for a password
  4. Confirm no password configuration exists
    In the web admin panel, look for a settings, security, or administrator password section; check if there is an option to set or change an admin password
    Affected if No password prompt appears and the password field is either absent or shows no password is set

A user is affected if they have an Epson Expression Home XP255 printer running firmware 20.08.FM10I8 whose web admin panel is accessible without authentication and has no password configured.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Access the printer's web admin panel or control panel and configure a strong administrator password to prevent unauthenticated access; consider disabling remote web management if not required.

Recommended fix Moderate confidence
  1. Access the Epson Expression Home XP255 web admin panel via its IP address on your local network
  2. Locate the Settings or Administrator section in the web interface
  3. Enable password protection and set a strong, unique password for the admin account
  4. Save the settings and verify that password authentication is required to access the admin panel
  5. Ensure the device is not directly exposed to the internet by placing it behind a NAT or firewall
  6. Consider disabling unnecessary network services (like Wi-Fi Direct) if not needed

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing1.0 h
  • Review / QA1.0 h
4.0 hours of engineering $750
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2019-20458 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data