CVE-2023-27971

Privilege escalation via undisclosed firmware buffer overflow

Published Apr 28, 2023 · Updated Jan 30, 2025

Buffer overflow in HP LaserJet Pro printer firmware from HP Inc. allows adjacent unauthenticated attackers to gain elevated device control. HP has not published the firmware component, input path, or unchecked copy operation that triggers the overflow. Exploitation requires adjacent-network access but no credentials or user interaction, and successful attacks gain elevated control of printer firmware.

CVSS severity8.8
High
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in HP LaserJet Pro printer firmware from HP Inc. allows adjacent unauthenticated attackers to gain elevated device control. HP has not published the firmware component, input path, or unchecked copy operation that triggers the overflow. Exploitation requires adjacent-network access but no credentials or user interaction, and successful attacks gain elevated control of printer firmware.

The record

CVE
CVE-2023-27971
Published
Apr 28, 2023
Updated
Jan 30, 2025
Vendor
HP Inc.
Product
HP LaserJet Pro
Classifications
CWE-120, T1068
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 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?

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 vectoradjacent
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

8.8HP Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1068Exploitation for Privilege Escalation

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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