CVE-2023-26301Network attack vector

Information disclosure and privilege elevation via unauthenticated endpoints

Published Jul 21, 2023 · Updated Aug 2, 2024

Missing authentication in HP LaserJet Pro 4201-4203 and MFP 4301-4303 firmware allows remote attackers to disclose information or elevate privileges. HP has not published the affected endpoint names or the operations they expose, leaving the precise authorization failure undisclosed. Unauthenticated network access is sufficient, with no user interaction or prior printer access required.

CVSS severity8.6
High
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in HP LaserJet Pro 4201-4203 and MFP 4301-4303 firmware allows remote attackers to disclose information or elevate privileges. HP has not published the affected endpoint names or the operations they expose, leaving the precise authorization failure undisclosed. Unauthenticated network access is sufficient, with no user interaction or prior printer access required.

The record

CVE
CVE-2023-26301
Published
Jul 21, 2023
Updated
Aug 2, 2024
Vendor
HP Inc.
Product
HP LaserJet Pro
Classifications
CWE-862
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=See HP Security Bulletin reference for affected versions.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HP Inc. · HP LaserJet Proversion=See HP Security Bulletin reference for affected versions.

Published CVSS scores

9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.6HP Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

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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