CVE-2026-18622

Content spoofing via misleading signature verification

Published Aug 13, 2026 · Updated Aug 13, 2026

Content spoofing in affected Foxit PDF Editor and PDF Reader releases allows attackers to present tampered signed PDFs as valid. The signature-validation UI does not accurately reflect signature integrity after appearance or coordinate changes or field duplication. A victim must open and assess a crafted signed PDF; the resulting false-valid indication can cause manipulated document content to be trusted.

CVSS severity4.7
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Content spoofing in affected Foxit PDF Editor and PDF Reader releases allows attackers to present tampered signed PDFs as valid. The signature-validation UI does not accurately reflect signature integrity after appearance or coordinate changes or field duplication. A victim must open and assess a crafted signed PDF; the resulting false-valid indication can cause manipulated document content to be trusted.

The record

CVE
CVE-2026-18622
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Foxit Software
Product
Foxit PDF Reader
Classifications
CWE-451
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Versions 2026.1.2 and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit PDF Readerversion=Versions 2026.1.2 and earlier
Foxit Software · Foxit PDF Editorversion=Versions 13.2.5 and earlier; version=Versions 14.0.5 and earlier; version=Versions 2026.1.2 and earlier

Published CVSS scores

4.7Foxit SoftwareCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-451User Interface (UI) Misrepresentation of Critical Information

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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