CVE-2026-18622

Analyzed Analyzed - Analysis Complete

Signature Field Tampering in Foxit PDF Editor/Reader

Publication date: 2026-08-13

Last updated on: 2026-09-10

Assigner: Foxit

Description

Foxit PDF Editor/Reader inconsistently alerts users when signature fields are abnormally modified, including alterations to appearance, coordinates, or field duplication. This may mislead users into trusting tampered documents, since the UI cannot accurately reflect the actual integrity status of signatures.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-13

Last Modified

2026-09-10

Generated

2026-09-22

AI Q&A

2026-08-13

EPSS Evaluated

2026-09-21

NVD

CVE-2026-18622

EUVD

EUVD-2026-57737

Affected Vendors & Products

Vendor	Product	Version / Range
foxit	pdf_editor	From 2023.1.0.15510 (inc) to 2023.3.0.23028 (inc)
foxit	pdf_editor	From 2024.1.0.23997 (inc) to 2024.4.1.27687 (inc)
foxit	pdf_editor	From 2025.1.0.27937 (inc) to 2025.3.0.35737 (inc)
foxit	pdf_editor	to 13.2.5.24109 (inc)
foxit	pdf_editor	From 14.0.0.33046 (inc) to 14.0.5.33580 (inc)
foxit	pdf_editor	From 2026.1.0.36452 (inc) to 2026.1.2.36540 (inc)
foxit	pdf_reader	to 2026.1.2.36540 (inc)
foxit	pdf_editor	From 2023.1.0.55583 (inc) to 2023.3.0.63083 (inc)
foxit	pdf_editor	From 2024.1.0.63682 (inc) to 2024.4.1.66479 (inc)
foxit	pdf_editor	From 2025.1.0.66692 (inc) to 2025.3.0.69570 (inc)
foxit	pdf_editor	to 13.2.5.63482 (inc)
foxit	pdf_editor	From 14.0.0.68868 (inc) to 14.0.5.69339 (inc)
foxit	pdf_editor	From 2026.1.0.70169 (inc) to 2026.1.2.70304 (inc)
foxit	pdf_reader	to 2026.1.2.70304 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-451	The user interface (UI) does not properly represent critical information to the user, allowing the information - or its source - to be obscured or spoofed. This is often a component in phishing attacks.

Attack-Flow Graph

Executive Summary

This vulnerability involves Foxit PDF Editor/Reader failing to consistently alert users when signature fields are tampered with. Changes like appearance alterations, coordinate shifts, or field duplication may go unnoticed, potentially misleading users into trusting falsified documents.

Detection Guidance

This CVE describes a UI inconsistency issue where signature field modifications are not properly alerted. Detection requires manual inspection of PDF documents for unexpected signature field changes. Check for documents with duplicated fields, altered coordinates, or modified appearances. Use Foxit's built-in signature validation tools to verify document integrity.

Impact Analysis

Attackers could exploit this to trick users into accepting fraudulent documents, leading to unauthorized actions or data breaches. Users may unknowingly rely on tampered signatures, compromising document integrity.

Compliance Impact

This vulnerability could undermine compliance by allowing undetected document tampering, potentially violating integrity requirements in GDPR or HIPAA. Trusted documents may be altered without detection, risking non-compliance.

Mitigation Strategies

Update Foxit PDF Reader and Editor to the latest versions immediately. Use the application's built-in update feature or download the latest versions from the official Foxit website to address the vulnerability.

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