Quick answers
- Is CVE-2026-91100 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91100 being exploited in the wild.
- How severe is CVE-2026-91100?
- 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-2026-91100?
- 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-2026-91100 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-91100?
- 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 identified and remediated multiple externally reported vulnerabilities across several HPLIP software components. The vulnerabilities enable remote code execution, privilege escalation, denial of service, information disclosure, and unauthorized file modification under certain conditions. Attack vectors and specific technical details are not fully specified in the available advisory; however, the combination of RCE and privilege escalation capabilities suggests network-accessible components with insufficient input validation or authorization controls. HP has published patches to address these issues.
Affected products
- HP HPLIP
Timeline
- 2026-09-16: disclosed