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Pdf EditorApplication · Foxit

CVE-2021-34950

HIGH · 7.8 CVSS v3.0 Published 2024-05-07
Fix available
A fix is available. Upgrade to after 11.0.1.49938 or later.
See remediation →
81/100
Remediation priority · High
No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Foxit PDF Reader Annotation Out-Of-Bounds Read Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of Annotation objects. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14396.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Foxit PDF Reader contains an out-of-bounds read vulnerability in Annotation object handling due to insufficient validation of user-supplied data. The lack of proper bounds checking allows reading past the end of an allocated object, potentially enabling arbitrary code execution in the context of the current process.

MitigationApply the vendor-supplied patch/update from Foxit. Users should avoid opening untrusted PDF files and refrain from visiting malicious websites until the update is installed.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Pdf EditorApplication
Affected:<= 10.1.5.37672= 11.0.0.49893= 11.0.1.49938
Pdf ReaderApplication
Affected:<= 11.0.1.49938

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm Foxit PDF software is installed
    Check for Foxit PDF Reader or Foxit PDF Editor in the system. Common installation paths: C:\Program Files\Foxit Software\Foxit Reader\ or C:\Program Files\Foxit Software\Foxit PDF Editor\. Alternatively, open the application and go to Help > About Foxit Reader or About Foxit PDF Editor.
    Affected if Neither Foxit PDF Reader nor Foxit PDF Editor is installed on the system.
  2. Identify the installed product and version
    Right-click on the Foxit executable (FoxitReader.exe or FoxitEditor.exe), select Properties, then go to the Details tab to view the Product version. Alternatively, open the application and navigate to Help > About to see the exact version number.
    Affected if The software is Foxit PDF Reader or Foxit PDF Editor with a version that falls within the affected ranges.
  3. Compare against affected versions for Foxit PDF Reader
    If using Foxit PDF Reader, compare your installed version against: all versions <= 11.0.1.49938. The exact affected version is 11.0.1.49938 and any prior version.
    Affected if The installed Foxit PDF Reader version is 11.0.1.49938 or any earlier version (for example, 11.0.0.x, 10.1.x, etc.).
  4. Compare against affected versions for Foxit PDF Editor
    If using Foxit PDF Editor, compare your installed version against: <= 10.1.5.37672, exactly 11.0.0.49893, or exactly 11.0.1.49938.
    Affected if The installed Foxit PDF Editor version is 10.1.5.37672 or lower, OR exactly 11.0.0.49893, OR exactly 11.0.1.49938.

A user is affected if Foxit PDF Reader version is 11.0.1.49938 or any prior version, or if Foxit PDF Editor version is 10.1.5.37672 or lower, or exactly 11.0.0.49893, or exactly 11.0.1.49938.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to a release after 11.0.1.49938
Interim mitigation

Apply the vendor-supplied patch/update from Foxit. Users should avoid opening untrusted PDF files and refrain from visiting malicious websites until the update is installed.

Fix this in Pdf Editor Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
5.0 hours of engineering $860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-34950 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data