CVE-2026-91814

A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.foxit.com/support/security-bulletins.html	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_reader::::::::

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

OR	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_editor::::::::
	cpe:2.3:a:foxit:pdf_reader::::::::

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*

History

29 Oct 2026, 17:15

Type	Values Removed	Values Added
References	~~() https://www.foxit.com/support/security-bulletins.html -~~	() https://www.foxit.com/support/security-bulletins.html - Vendor Advisory
CPE		cpe:2.3:o:apple:macos:-:::::::* cpe:2.3:o:microsoft:windows:-:::::::* cpe:2.3:a:foxit:pdf_reader:::::::: cpe:2.3:a:foxit:pdf_editor::::::::
First Time		Apple Foxit Microsoft Foxit pdf Reader Microsoft windows Foxit pdf Editor Apple macos

23 Sep 2026, 08:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-23 08:17

Updated : 2026-10-29 17:15

NVD link : CVE-2026-91814

Mitre link : CVE-2026-91814

CVE.ORG link : CVE-2026-91814

JSON object : View

Products Affected

microsoft

windows

foxit

pdf_editor
pdf_reader

apple

macos

CWE

CWE-347

Improper Verification of Cryptographic Signature

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