CVE-2026-18622
Received Received - Intake

Signature Field Tampering in Foxit PDF Editor/Reader

Publication date: 2026-08-13

Last updated on: 2026-08-13

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.

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Meta Information

Published
2026-08-13
Last Modified
2026-08-13
Generated
2026-08-13
AI Q&A
2026-08-13
EPSS Evaluated
N/A
NVD
CVE-2026-18622
EUVD
EUVD-2026-57737

Affected Vendors & Products

Showing 7 associated CPEs
Vendor Product Version / Range
foxit pdf_reader to 2024.2.3.25184 (exc)
foxit pdf_editor to 2024.2.3.25184 (exc)
foxit pdf_editor From 2024.0.0 (inc)
foxit pdf_editor to 2023.3.0.23028 (exc)
foxit pdf_editor to 13.1.3.22478 (exc)
foxit pdf_editor to 12.1.7.15526 (exc)
foxit pdf_editor to 11.2.10.53951 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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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.

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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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