CVE-2026-91804 — HIGH (7.8)

Q: How severe is CVE-2026-91804?

CVE-2026-91804 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-91804?

Check the references section above for vendor advisories and patch information. Affected products include: Foxit Pdf Editor, Foxit Pdf Reader, Microsoft Windows.

Vulnerability Description

A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s rendering of Circle annotations with malformed Cloudy appearance streams in specially crafted PDF files. Insufficient validation of the appearance geometry can result in memory corruption and application crashes.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Foxit	Pdf Editor	<= 13.2.5.63482
Foxit	Pdf Reader	<= 2026.2.0.39747
Microsoft	Windows	-

Related Weaknesses (CWE)

CWE-787

References

https://www.foxit.com/support/security-bulletins.htmlVendor Advisory

FAQ

What is CVE-2026-91804?

CVE-2026-91804 is a vulnerability with a CVSS score of 7.8 (HIGH). A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s rendering of Circle annotations with malformed Cloudy appearance streams in specially crafted PDF files. Insufficient...

How severe is CVE-2026-91804?

CVE-2026-91804 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-91804?

Check the references section above for vendor advisories and patch information. Affected products include: Foxit Pdf Editor, Foxit Pdf Reader, Microsoft Windows.