CVE-2026-91100: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in HP Inc. HP Linux Imaging and Printing Software (HPLIP)
HP has identified and remediated multiple externally reported vulnerabilities within HPLIP. The findings affect several software components that could potentially enable remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification under certain conditions.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-91100) in HP Linux Imaging and Printing Software (HPLIP) involves improper neutralization of special elements used in OS commands (CWE-78), which can lead to OS command injection. The flaw affects versions earlier than 3.26.6. Exploitation could result in remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification. The CVSS 4.0 vector indicates local attack vector with low attack complexity, no privileges required, user interaction needed, and high impact on integrity and availability. HP has acknowledged and remediated this and other vulnerabilities in HPLIP.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary OS commands, potentially leading to remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modifications. The attack requires local access and user interaction but does not require privileges. The impact on system integrity and availability is high, while confidentiality impact is low.
Mitigation Recommendations
HP has remediated this vulnerability in HPLIP version 3.26.6. Users should upgrade to version 3.26.6 or later to address this issue. Since this is not a cloud service, remediation depends on applying the vendor's official fix. Patch status is confirmed by the vendor advisory indicating remediation in version 3.26.6.
CVE-2026-91100: CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') in HP Inc. HP Linux Imaging and Printing Software (HPLIP)
Description
HP has identified and remediated multiple externally reported vulnerabilities within HPLIP. The findings affect several software components that could potentially enable remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification under certain conditions.
CVSS v4.0
Score 6.8medium
Affected software
HP Inc.
HP Linux Imaging and Printing Software (HPLIP)
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-91100) in HP Linux Imaging and Printing Software (HPLIP) involves improper neutralization of special elements used in OS commands (CWE-78), which can lead to OS command injection. The flaw affects versions earlier than 3.26.6. Exploitation could result in remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification. The CVSS 4.0 vector indicates local attack vector with low attack complexity, no privileges required, user interaction needed, and high impact on integrity and availability. HP has acknowledged and remediated this and other vulnerabilities in HPLIP.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary OS commands, potentially leading to remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modifications. The attack requires local access and user interaction but does not require privileges. The impact on system integrity and availability is high, while confidentiality impact is low.
Mitigation Recommendations
HP has remediated this vulnerability in HPLIP version 3.26.6. Users should upgrade to version 3.26.6 or later to address this issue. Since this is not a cloud service, remediation depends on applying the vendor's official fix. Patch status is confirmed by the vendor advisory indicating remediation in version 3.26.6.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- hp
- Date Reserved
- 2026-09-14T19:13:23.919Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aaae7b755bf5e2cf508754d
Added to database: 09/16/2026, 19:02:15 UTC
Last enriched: 09/16/2026, 19:17:31 UTC
Last updated: 09/17/2026, 02:22:45 UTC
Views: 6
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