CVE-2021-31449

Code execution via U3D object double free

Published May 7, 2021 · Updated Aug 3, 2024

Double-free in Foxit PDF Reader 10.1.1.37576 allows remote attackers to execute code by opening a crafted U3D PDF file. The Windows 3D Plugin Beta fails to confirm that a U3D object exists before freeing it again during embedded-object parsing. A victim must visit a malicious page or open a malicious file, after which code runs in the current reader process.

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

Double-free in Foxit PDF Reader 10.1.1.37576 allows remote attackers to execute code by opening a crafted U3D PDF file. The Windows 3D Plugin Beta fails to confirm that a U3D object exists before freeing it again during embedded-object parsing. A victim must visit a malicious page or open a malicious file, after which code runs in the current reader process.

The record

CVE
CVE-2021-31449
Published
May 7, 2021
Updated
Aug 3, 2024
Vendor
Foxit Software
Product
Foxit PDF Reader
Classifications
CWE-415, T1204.002
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=10.1.1.37576

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit PDF Readerversion=10.1.1.37576

Published CVSS scores

7.8Zero Day InitiativeCVSS:3.0/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.

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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-415Double Free
T1204.002Malicious File

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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