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CVE-2026-91803

Foxit Pdf Editor privilege escalation

8.8 HIGHEPSS 0.12%
  1. Published23 Sept 2026

Description

A local privilege escalation vulnerability exists in the updater of Foxit PDF Editor/Reader due to unsafe loading of dynamic-link libraries from a user-writable directory during high-privilege operations. A local attacker could exploit this issue to execute code with elevated privileges.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Foxit Pdf Editor≥ 14.0.0.33046 ≤ 14.0.7.33751 · ≥ 2023.1.0.15510 ≤ 2023.3.0.23028 · ≥ 2024.1.0.23997 ≤ 2024.4.1.27687 · ≥ 2025.1.0.27937 ≤ 2025.3.0.35737
Foxit Pdf Reader≤ 2026.2.0.39747

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2026-91803 being actively exploited?

CVE-2026-91803 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.12%.

How severe is CVE-2026-91803?

CVE-2026-91803 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.12% probability of exploitation.

Which products are affected by CVE-2026-91803?

Affected products include Foxit Pdf Editor, Foxit Pdf Reader.

How do I fix CVE-2026-91803?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-91803 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.