CVE-2026-91812
ZDI-26-741: Foxit PDF Reader FoxitUpdater Improper Certificate Validation Local Privilege Escalation Vulnerability
Published Sep 23, 2026
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Foxit PDF Reader. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 7.1. The following CVEs are assigned: CVE-2026-91812.
Timeline
Detection, updates, and resolution for this record.
Sep 23, 2026 · Catalog
Detected
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Foxit PDF Reader. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 7.1. The following CVEs are assigned: CVE-2026-91812.
Sources
- CVE.orgCVE-2026-91812
Official CVE identifier
cve.org - FIRST EPSSCVE-2026-91812
30-day exploitation probability 0.1%
first.org - Zero Day InitiativeZDI-26-741
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Foxit PDF Reader. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 7.1. The following CVEs are assigned: CVE-2026-91812.
zerodayinitiative.com