Vulnerability in Foxit Software Inc. Pdf Editor
CVE-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 spoofing while the document continues to appear validly signed.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (7.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
- Foxit Software Inc. Pdf Editor — versions Versions 13.2.6 and earlier, Versions 14.0.7 and earlier, Versions 2026.2 and earlier
- Foxit Software Inc. Pdf Reader — versions Versions 2026.2 and earlier
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-91814?
- CVE-2026-91814 is a medium-severity vulnerability in Foxit Software Inc. Pdf Editor, classified under Improper Verification of Cryptographic Signature. CVSS score: 5.3/10. Published 2026-09-23.
- How severe is CVE-2026-91814?
- Medium severity. CVSS v3 base score is 5.3 out of 10.