CVE-2026-91805

Description

A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s PDF page-tree handling. A specially crafted PDF can trigger page-structure changes during rendering, causing the application to access released page objects and resulting in memory corruption and an application crash.

Overview

State: PUBLISHED
Assigner (CNA): Foxit
CVSS severity: HIGH
CVSS score: 7.8 / 10
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Effective score: 7.8 / 10 HIGH source: CNA overview
CWE(s): CWE-416
Reserved: 2026-09-15
Published: 2026-09-23 07:50 UTC
Last updated: 2026-09-23 14:45 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/91xxx/CVE-2026-91805.json
Linked Threat: CVE-2026-91805 — Use-after-free Vulnerability in Foxit PDF Editor/Reader Page-tree Handling

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 08:17:12 UTC
NVD last modified: 2026-09-23 17:58:26 UTC
NVD CVSS v3.1: 7.8 / 10 HIGH source: 14984358-7092-470d-8f34-ade47a7658a2
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploitability subscore: 1.8 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.0017 (probability of exploitation in next 30 days)
EPSS percentile: 6.76% vs all CVEs — higher = more likely to be exploited, as of 2026-09-23

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85123
Assigner: Foxit
Published: Sep 23, 2026, 7:50:51 AM
Updated: Sep 23, 2026, 2:45:53 PM
EUVD base score (CVSS 3.1): 7.8 / 10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EUVD-reported EPSS: 0.1700
Vendors: Foxit Software Inc.
Products: Foxit PDF Editor (Versions 2026.2 and earlier)

Foxit PDF Reader (Versions 2026.2 and earlier)

Foxit PDF Editor (Versions 14.0.7 and earlier)

Foxit PDF Editor (Versions 13.2.6 and earlier)
Aliases: GHSA-w77c-2xq3-h9h8

ENISA description: A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s PDF page-tree handling. A specially crafted PDF can trigger page-structure changes during rendering, causing the application to access released page objects and resulting in memory corruption and an application crash.

EUVD references (1)

https://www.foxit.com/support/security-bulletins.html

Affected products (2)

Vendor	Product	Versions	Platforms
Foxit Software Inc.	Foxit PDF Editor	`Versions 2026.2 and earlier` (affected), `Versions 14.0.7 and earlier` (affected), `Versions 13.2.6 and earlier` (affected)	Windows
Foxit Software Inc.	Foxit PDF Reader	`Versions 2026.2 and earlier` (affected)	Windows

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://www.foxit.com/support/security-bulletins.html

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://www.foxit.com/support/security-bulletins.html 14984358-7092-470d-8f34-ade47a7658a2

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

CVE-2026-91805 - Vulnerability Details - OpenCVE

web:app.opencve.io

A use-after-free vulnerability exists in Foxit PDF Editor/Reader's PDF page-tree handling. A specially crafted PDF can trigger page-structure changes during rendering, causing the application to access released page objects and resulting in memory corruption and an application crash.

2026-09-24 11:10 UTC
CVE-2026-91805 - Exploits & Severity - Feedly

web:feedly.com

This CVE ID has been reserved by a CNA but the vulnerability details have not yet been published. Feedly AI found some discussions about it.

2026-09-24 11:10 UTC
Microsoft January 2026 Security Updates (FYI) - Microsoft Q&A

web:learn.microsoft.com

January 2026 Security Updates This release consists of the following 112 Microsoft CVEs : Tag CVE Base Score CVSS Vector Exploitability FAQs? Workarounds? Mitigations ? Windows Deployment Services CVE - 2026 -0386 SQL Server CVE - 2026 -20803 Windows Hello…

2026-09-24 11:10 UTC
Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-09-24 11:10 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-24 11:10 UTC
CVE-2026-91805 - Use-After-Free in Foxit PDF Editor/Reader…

web:vulmon.com

Vulnerability Summary Foxit PDF Editor/Reader versions are affected by a use-after-free vulnerability in their PDF page-tree handling. A malicious PDF crafted to alter page structures during rendering can cause the application to access deallocated page objects. This leads to memory corruption and an application crash.

2026-09-24 11:10 UTC
CVE-2026-91805 - vulnerability database | Vulners.com

web:vulners.com

CVE-2026-91805 🗓️ 23 Sep 2026 00:50:51 Reported by Foxit Type cve 🔗 web.nvd.nist.gov 👁 7 Views

2026-09-24 11:10 UTC
Critical Patches Issued for Microsoft Products, August 11, 2026

web:www.cisecurity.org

<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...

2026-09-24 11:10 UTC
CVE-2026-91805: Foxit Software Inc.: A use-after-free ... - Rapid7

web:www.rapid7.com

CVE-2026-91805 : Foxit Software Inc.: A use-after-free vulnerability exists in Foxit PDF Editor/Reader's PDF page-tree handling. View severity, references, and remediation details from Rapid7.

2026-09-24 11:10 UTC
Patch Tuesday September 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's September 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-09-24 11:10 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-91805.json.

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