Medium severity6.1NVD Advisory· Published Sep 23, 2026· Updated Oct 1, 2026

CVE-2026-91817

Description

A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of wide strings in embedded PDF JavaScript. Insufficient validation of string-deletion ranges can cause an integer underflow, resulting in an out-of-bounds read and application crash.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Foxitsoftware/PDF Editor/Readerllm-create
Foxitsoftware/PDF Editor
cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*
Range: <=13.2.5.63482
Foxitsoftware/PDF Reader
cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*
Range: <=2026.2.0.39747

Patches

Vulnerability mechanics

References

www.foxit.com/support/security-bulletins.htmlnvdVendor Advisory

News mentions

Foxit PDF Editor/Reader: 23 Vulnerabilities Disclosed in Single Batch, Affecting Multiple Components
Vypr Intelligence · Sep 23, 2026
ZDI-26-745: Foxit PDF Reader AcroForm Out-of-Bounds Read Remote Code Execution Vulnerability
Zero Day Initiative · Sep 23, 2026

cvss	0.397
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000