Quick answers
- Is CVE-2026-91099 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91099 being exploited in the wild.
- How severe is CVE-2026-91099?
- Critical severity, with a CVSS score of 9.8, published 16 September 2026.
- Which products and versions are affected?
- HP HPLIP.
- Is there a fix for CVE-2026-91099?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-91099 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-91099?
- Check whether you run HPLIP, Hp Linux Imaging or Hp Printing. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
HP has patched multiple vulnerabilities affecting various components within HPLIP (HP Linux Imaging and Printing). The vulnerabilities span several classes including remote code execution, privilege escalation, denial of service, and information disclosure. Attack vectors and specific preconditions are not detailed in the available advisory text, but the CVSS 9.8 score and remote code execution capability suggest network-reachable attack surface with minimal authentication or user interaction required. Patches have been released; users should update to the latest HPLIP version.
Affected products
- HP HPLIP
Timeline
- 2026-09-16: disclosed