CVE-2026-91809
ZDI-26-738: Foxit PDF Reader Annotation Use-After-Free Information Disclosure Vulnerability
Published Sep 23, 2026
This vulnerability allows remote attackers to disclose sensitive information 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 3.3. The following CVEs are assigned: CVE-2026-91809.
Timeline
Detection, updates, and resolution for this record.
Sep 23, 2026 · Catalog
Detected
This vulnerability allows remote attackers to disclose sensitive information 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 3.3. The following CVEs are assigned: CVE-2026-91809.
Sources
- CVE.orgCVE-2026-91809
Official CVE identifier
cve.org - FIRST EPSSCVE-2026-91809
30-day exploitation probability 0.1%
first.org - Zero Day InitiativeZDI-26-738
This vulnerability allows remote attackers to disclose sensitive information 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 3.3. The following CVEs are assigned: CVE-2026-91809.
zerodayinitiative.com