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CVE-2026-91817

Foxit PDF Editor/Reader AcroForm Out-of-Bounds Read Remote Code Execution Vulnerability

MEDIUM
6.1
CVSS Score
Published: September 23, 2026 at 07:49 AM UTC
Updated: October 1, 2026 at 08:23 PM UTC
2 products affected across 1 vendorPDF ReaderPDF Editor

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

PDF Editor· Foxitsoftware
95%
v ≤ 13.2.5.63482v ≤ 13.2.6v ≤ 14.0.7v ≤ 2026.214.0.0.33046 ≤ v ≤ 14.0.7.337512023.1.0.15510 ≤ v ≤ 2023.3.0.230282024.1.0.23997 ≤ v ≤ 2024.4.1.276872025.1.0.27937 ≤ v ≤ 2025.3.0.357372026.1.0.36452 ≤ v ≤ 2026.2.0.39747
PDF Reader· Foxitsoftware
95%
v ≤ 2026.2v ≤ 2026.2.0.39747

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://www.foxit.com/support/security-bulletins.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMFoxit
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-125

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