CVE-2026-5942

Crash via invalidated AcroForm signature object access

Published Apr 27, 2026 · Updated Apr 27, 2026

Use-after-free in affected Foxit PDF Editor and PDF Reader versions allows attackers to crash the application via a crafted PDF. Page lifecycle changes can desynchronize AcroForm signature component state, after which later processing dereferences a signature object that has already been invalidated. Opening the document is required, and the published assessment bounds the consequence to an application crash without confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in affected Foxit PDF Editor and PDF Reader versions allows attackers to crash the application via a crafted PDF. Page lifecycle changes can desynchronize AcroForm signature component state, after which later processing dereferences a signature object that has already been invalidated. Opening the document is required, and the published assessment bounds the consequence to an application crash without confidentiality or integrity impact.

The record

CVE
CVE-2026-5942
Published
Apr 27, 2026
Updated
Apr 27, 2026
Vendor
Foxit Software
Product
Foxit PDF Reader
Classifications
CWE-416, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Versions 2026.1 and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit PDF Readerversion=Versions 2026.1 and earlier
Foxit Software · Foxit PDF Editorversion=Versions 13.2.3 and earlier; version=Versions 14.0.3 and earlier; version=Versions 2026.1 and earlier

Published CVSS scores

5.5FoxitCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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