CVE-2026-91103 HP Inc. CVE debrief

Who should care

Defenders responsible for HP Linux Imaging and Printing (HPLIP) systems should assess exposure and prioritize patching and compensating controls. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify and apply patches, review compensating controls, and monitor for potential exploitation attempts.

Why it matters

Defenders should prioritize verifying and applying patches for HPLIP, assessing exposure, and implementing compensating controls due to potential remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification under certain conditions.

• Potential remote code execution
• Potential privilege escalation
• Potential denial of service attacks
• Potential information disclosure

Technical summary

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. These vulnerabilities are addressed in the official CVE Program record and NVD detail page. Defenders should prioritize verifying and applying patches for HPLIP, assessing exposure, and implementing compensating controls.

Defensive priority

Defenders should prioritize verifying and applying patches for HPLIP, assessing exposure, and implementing compensating controls.

Recommended defensive actions

• Verify and apply patches for HPLIP
• Assess exposure and implement compensating controls
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on multiple externally reported vulnerabilities within HPLIP that could potentially enable remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification under certain conditions.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.