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CVE-2026-18622— Foxit PDF Editor/Reader's signature-validation pop-up reports modified certified documents as valid

Quick assessment

Affected
Foxit Software Inc. Foxit PDF Editor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Foxit PDF Editor是中国Foxit公司的一款PDF编辑器。 Foxit PDF Editor 2026.1.2及之前版本、14.0.5及之前版本和13.2.5及之前版本和Foxit PDF Reader 2026.1.2及之前版本存在处理逻辑错误漏洞，该漏洞源于对签名域异常修改的提示不一致，可能导致用户信任被篡改的文档。

CVSS 4.7 · Medium EPSS 0.12% · P2

Affected Version Matrix 4

VendorProduct Version RangeStatus
Foxit Software Inc. Foxit PDF Editor Versions 2026.1.2 and earlier affected
Versions 14.0.5 and earlier affected
Versions 13.2.5 and earlier affected
Foxit Software Inc. Foxit PDF Reader Versions 2026.1.2 and earlier affected
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I. Basic Information for CVE-2026-18622

Vulnerability Information
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Vulnerability Title
Foxit PDF Editor/Reader's signature-validation pop-up reports modified certified documents as valid
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键信息的UI错误表达
Source: CVE Program / CVE List V5
Vulnerability Title
Foxit PDF Editor 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Foxit PDF Editor是中国Foxit公司的一款PDF编辑器。 Foxit PDF Editor 2026.1.2及之前版本、14.0.5及之前版本和13.2.5及之前版本和Foxit PDF Reader 2026.1.2及之前版本存在处理逻辑错误漏洞，该漏洞源于对签名域异常修改的提示不一致，可能导致用户信任被篡改的文档。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Foxit Software Inc. Foxit PDF Editor Versions 2026.1.2 and earlier -
Foxit Software Inc. Foxit PDF Reader Versions 2026.1.2 and earlier -

II. Public POCs for CVE-2026-18622

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III. Intelligence Information for CVE-2026-18622

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IV. Related Vulnerabilities

Same product: Foxit PDF Editor
Same vendor: Foxit Software Inc.
Same weakness: CWE-451

V. Comments for CVE-2026-18622

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