Buffer overflow in Foxit Pdf Editor
CVE-2026-91804
A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s rendering of Circle annotations with malformed Cloudy appearance streams in specially crafted PDF files. Insufficient validation of the appearance geometry can result in memory corruption and application crashes.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (6.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Foxit Pdf Editor
- Foxit Pdf Reader
- 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
- 14984358-7092-470d-8f34-ade47a7658a2 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-91804?
- CVE-2026-91804 is a high-severity vulnerability in Foxit Pdf Editor, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-09-23.
- How severe is CVE-2026-91804?
- High severity. CVSS v3 base score is 7.8 out of 10.