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Vulnerabilities/CVE-2026-91811Public Intelligence Dossier
Source: foxit · Limited verification•Last verified: •Collection Degraded
CVE-2026-91811Unknown / EvaluatingHIGH (raw)CVSS 7.8CWE-787

A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s PRC parser due to insufficient validation of vertex indices in triangular fan texture meshes

Published: 23 Sept 2026•Last updated: 15 Oct 2026, 07:40 PM IST•Source identifier: 14984358-7092-470d-8f34-ade47a7658a2
Dossier completeness: source-provided sections 2 / 3 · rule guidance not available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
7.8HIGH (raw)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Metric source14984358-7092-470d-8f34-ade47a7658a2
EPSS probability
0.1%0.001
Percentile1st
Weakness type
CWE-787
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s PRC parser due to insufficient validation of vertex indices in triangular fan texture meshes. Successful exploitation could result in memory corruption and an application crash.

SOC priority

High

Actively exploited

Unknown

Publicly disclosed

Unknown

Risk basis: Microsoft or Microsoft-managed product relevance; HIGH severity; No confirmed exploitation signal in current enrichment

Affected Products & Remediation

2 source-backed products
Affected products and versions (source)
  • foxit pdf editor · <= 13.2.5.63482; >= 14.0.0.33046 <= 14.0.7.33751; >= 2023.1.0.15510 <= 2023.3.0.23028; >= 2024.1.0.23997 <= 2024.4.1.27687; >= 2025.1.0.27937 <= 2025.3.0.35737; >= 2026.1.0.36452 <= 2026.2.0.39747; <= 13.2.2.63349; >= 14.0.0.68868 <= 14.0.7.69441; >= 2023.1.0.55583 <= 2023.3.0.63083; >= 2024.1.0.63682 <= 2024.4.1.66479; >= 2025.1.0.66692 <= 2025.3.0.69570; >= 2026.1.0.70169 <= 2026.2.0.72029 · NVD CPE · Source
  • foxit pdf reader · <= 2026.2.0.39747; <= 2026.2.1.39815 · NVD CPE · Source
NVD applicability prerequisites: cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*, cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*. These are conditions, not proof that an environment is exposed or unaffected.
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

No rule-based guidance for this vulnerability class

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
14984358-7092-470d-8f34-ade47a7658a2
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*, cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*, cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*, cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*

Evidence & Provenance

2 public sources
foxit.comSource recordnvd.nist.govSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2026-91811
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2026-91811
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2026-91811"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Correlated briefings

— No published briefing references this CVE

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.