CVE-2021-31468

Code execution via unchecked U3D data ranges

Published May 7, 2021 · Updated Aug 3, 2024

Out-of-bounds read in Foxit PDF Reader 10.1.3.37598 and earlier allows remote attackers to execute code through a crafted U3D PDF. The Windows 3D Plugin Beta fails to validate illogical U3D data ranges and reads past the end of an allocated data structure. Execution occurs in the current process only after a user visits a malicious page or opens the file; malformed input can also crash the application.

CVSS severity7.8
High
EPSS probability2.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Foxit PDF Reader 10.1.3.37598 and earlier allows remote attackers to execute code through a crafted U3D PDF. The Windows 3D Plugin Beta fails to validate illogical U3D data ranges and reads past the end of an allocated data structure. Execution occurs in the current process only after a user visits a malicious page or opens the file; malformed input can also crash the application.

The record

CVE
CVE-2021-31468
Published
May 7, 2021
Updated
Aug 3, 2024
Vendor
Foxit Software
Product
Foxit PDF Reader
Classifications
CWE-125, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=10.1.3.37598

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit PDF Readerversion=10.1.3.37598

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8Zero Day InitiativeCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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