CVE-2023-26067Public exploit

Code execution via unvalidated system-call strings

Published Apr 10, 2023 · Updated Feb 11, 2025

Command injection in Lexmark device firmware 081.232 and earlier allows attackers to execute arbitrary code through unvalidated system calls. The _WriteTarFile method passes a user-supplied string to a system call and runs it as root; fax_change_faxtrace_settings similarly invokes a system call without validating input. The first path requires prior low-privileged compromise, while the fax-script path is network-adjacent and unauthenticated, with code running as httpd.

CVSS severity8.0
High
EPSS probability37.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Lexmark device firmware 081.232 and earlier allows attackers to execute arbitrary code through unvalidated system calls. The _WriteTarFile method passes a user-supplied string to a system call and runs it as root; fax_change_faxtrace_settings similarly invokes a system call without validating input. The first path requires prior low-privileged compromise, while the fax-script path is network-adjacent and unauthenticated, with code running as httpd.

The record

CVE
CVE-2023-26067
Published
Apr 10, 2023
Updated
Feb 11, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-269, CWE-20, T1190, T1068, T1059.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

8.0LexmarkCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
7.8Trend Micro Zero Day InitiativeCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Trend Micro Zero Day InitiativeCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Trend Micro Zero Day InitiativeCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
CWE-20Improper Input Validation
T1190Exploit Public-Facing Application
T1068Exploitation for Privilege Escalation
T1059.004Unix Shell

Public exploit references

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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