Quick answers
- Is CVE-2026-91104 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91104 being exploited in the wild.
- How severe is CVE-2026-91104?
- Critical severity, with a CVSS score of 9.8, published 16 September 2026.
- Which products and versions are affected?
- HPLIP <UNKNOWN>.
- Is there a fix for CVE-2026-91104?
- 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-2026-91104 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-91104?
- Check whether you run HPLIP, Hp Linux Imaging or Hp Printing at an affected version. 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
CVE-2026-91104 encompasses multiple vulnerabilities in HP's Linux Imaging and Printing (HPLIP) software, a system library for printer and scanner support. The advisory reports that affected components can enable remote code execution, privilege escalation, denial of service, information disclosure, and unauthorized file modification. The network attack vector and critical CVSS score (9.8) suggest at least one flaw is remotely exploitable with no authentication or user interaction required. HP has released remediated versions; users should update HPLIP to the patched release immediately.
Affected products
- HP HPLIP <UNKNOWN>
Timeline
- 2026-09-16: disclosed