CVE-2023-35178

Unauthenticated root code execution via PATH_INFO overflow

Published Jun 30, 2023 · Updated Dec 4, 2024

Stack-based buffer overflow in HP LaserJet Pro firmware allows remote attackers to execute arbitrary code via adjacent-network requests. The slangapp binary copies attacker-controlled PATH_INFO data into a fixed-length stack buffer without first validating its length. No authentication is required, but network access to the printer is necessary; successful exploitation runs code with root privileges.

CVSS severity8.8
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in HP LaserJet Pro firmware allows remote attackers to execute arbitrary code via adjacent-network requests. The slangapp binary copies attacker-controlled PATH_INFO data into a fixed-length stack buffer without first validating its length. No authentication is required, but network access to the printer is necessary; successful exploitation runs code with root privileges.

The record

CVE
CVE-2023-35178
Published
Jun 30, 2023
Updated
Dec 4, 2024
Vendor
HP Inc.
Product
HP LaserJet Pro
Classifications
CWE-120, T1190
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 4, 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 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
8.8NIST National Vulnerability DatabaseCVSS:3.1/AV:A/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1190Exploit Public-Facing Application

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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