ZDI-26-742: Foxit PDF Reader FoxitUpdater Race Condition Local Privilege Escalation Vulnerability

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Sep 23, 2026 · Catalog

   Detected

   This vulnerability allows local attackers to escalate privileges on affected installations of Foxit PDF Reader. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-91813.

Sources

• CVE.orgVulnerability recordCVE-2026-91813

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-91813

  30-day exploitation probability 0.1%

  first.org
• Zero Day InitiativeCoordinated disclosureZDI-26-742

  This vulnerability allows local attackers to escalate privileges on affected installations of Foxit PDF Reader. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-91813.

  zerodayinitiative.com