Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-91803

CVE-2026-91803HIGH

Foxit Software Inc. Foxit PDF Editor — Security Vulnerability Report – Foxit PDF Editor/Reader Updater DLL Search Path Hijacking

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  H  H  H    7.8   .0012    1.5     —

AFFECTED
  Product           Versions                       Fixed
  Foxit PDF Editor  Versions 2026.2 and earlier –  —
  Foxit PDF Reader  Versions 2026.2 and earlier –  —

TIMELINE
  Sep 15  Reserved by Foxit
  Sep 23  Published (CNA: Foxit)
  Oct 8   RESCORED — CVE-2026-91803 (Foxit Software Inc. Foxit PDF Editor). CVSS 8.8 → 7.8 (NVD).

CWE-427 · CNA: Foxit · CVSS v3.1 · 1 reference · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 15, 2026	Reserved	Reserved by Foxit
September 23, 2026	Published	Published (CNA: Foxit)
October 8, 2026	RESCORED	RESCORED — CVE-2026-91803 (Foxit Software Inc. Foxit PDF Editor). CVSS 8.8 → 7.8 (NVD).

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Foxit Software Inc.	Foxit PDF Editor	—	Versions 2026.2 and earlier	—
Foxit Software Inc.	Foxit PDF Reader	—	Versions 2026.2 and earlier	—

Weaknesses

CWE-427

References (1)

https://www.foxit.com/support/security-bulletins.html [Vendor Advisory]

Authoritative record: CVE-2026-91803 at cve.org

Vendors: foxit software

Weaknesses: CWE-427

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-91803 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.