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Vulnerabilities

Vulnerability · CVE-2026-91814

A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents.

Published Sep 23, 2026 · catalog updated Oct 29, 2026 · pdf editor

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-91814. EPSS is 0.17%. Act only if a listed version of pdf editor is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.17%
Remediation
Version ranges on file
Affected products
cpe foxit/pdf editor · cpe foxit/pdf reader

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe foxit/pdf editor<= 13.2.2.63349
  • cpe foxit/pdf editor<= 13.2.5.63482
  • cpe foxit/pdf editor>= 14.0.0.33046, <= 14.0.7.33751
  • cpe foxit/pdf editor>= 2023.1.0.15510, <= 2023.3.0.23028
  • cpe foxit/pdf editor>= 2024.1.0.23997, <= 2024.4.1.27687
  • cpe foxit/pdf editor>= 2025.1.0.27937, <= 2025.3.0.35737
  • cpe foxit/pdf editor>= 2026.1.0.36452, <= 2026.2.0.39747
  • cpe foxit/pdf reader<= 2026.2.0.39747

How to fix CVE-2026-91814

  • Upgrade

    CVE-2026-91814 lists a fix boundary at 13.2.2.63349. Compare the installed build with that boundary before you change production.

  • Version check

    Affected <= 13.2.2.63349

  • Advisory

    Open the nvd record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-91814. EPSS is 0.17%. Act only if a listed version of pdf editor is installed.

Which versions are affected?

Compare what you have installed with foxit/pdf editor <= 13.2.2.63349; foxit/pdf editor <= 13.2.5.63482; foxit/pdf editor >= 14.0.0.33046, <= 14.0.7.33751; foxit/pdf editor >= 2023.1.0.15510, <= 2023.3.0.23028. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-347: Improper Verification of Cryptographic Signature. EPSS 0.17%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 23, 2026 · NIST NVD

    Detected

    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.

  2. Oct 29, 2026 · NIST NVD

    Updated

    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.

Sources

  • NIST NVDVulnerability recordCVE-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 sp

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • NIST NVDOct 29, 2026