CVE-2026-91099 HP Inc. CVE debrief

Who should care

Defenders responsible for HPLIP installations, Linux system administrators, and security teams should assess exposure and prioritize remediation. They should verify HPLIP versions, apply vendor remediation, and monitor for potential exploitation attempts. This includes reviewing and updating the inventory of HPLIP installations and ensuring that compensating controls are in place for exposed systems.

Why it matters

CVE-2026-91099 is a medium-severity vulnerability in HPLIP software, potentially leading to remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification. Defenders should verify HPLIP versions, apply vendor remediation, and monitor for potential exploitation attempts.

• Potential remote code execution requires verification from official sources
• Possible privilege escalation necessitates prompt attention
• Denial of service and information disclosure are potential consequences
• Unauthorized file modification requires defensive measures

Technical summary

The vulnerability affects HP's Linux Imaging and Printing (HPLIP) software, potentially enabling remote code execution, privilege escalation, denial of service, information disclosure, or unauthorized file modification under certain conditions. The CVSS score is 5.1, and the CVSS severity is MEDIUM. The findings affect several software components that could potentially enable such impacts under certain conditions. Defenders should verify HPLIP versions and apply vendor remediation to mitigate these risks effectively.

Defensive priority

Defenders should prioritize verifying HPLIP versions and applying vendor remediation.

Recommended defensive actions

• Verify HPLIP versions and apply vendor remediation
• Review and update inventory of HPLIP installations
• 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 detail page provide information on the vulnerability. Further verification of affected versions and remediation is required. 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. Official sources indicate a CVSS score of 5.1 and a MEDIUM severity level.

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.