CVE-2021-27269

Code execution via mismatched U3D KeyFrames count

Published Mar 30, 2021 · Updated Aug 3, 2024

Out-of-bounds write in Foxit PhantomPDF 10.1.0.37527 allows remote attackers to execute code through a malicious U3D PDF. The U3DBrowser parser trusts a MOTIONRESOURCE block's KeyFrames count when it differs from the entries actually present, causing a write past an allocated structure. A victim must open the file or visit a malicious page with the 3D Plugin Beta in use; successful exploitation runs code in the current process.

CVSS severity7.8
High
EPSS probability2.49%
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 write in Foxit PhantomPDF 10.1.0.37527 allows remote attackers to execute code through a malicious U3D PDF. The U3DBrowser parser trusts a MOTIONRESOURCE block's KeyFrames count when it differs from the entries actually present, causing a write past an allocated structure. A victim must open the file or visit a malicious page with the 3D Plugin Beta in use; successful exploitation runs code in the current process.

The record

CVE
CVE-2021-27269
Published
Mar 30, 2021
Updated
Aug 3, 2024
Vendor
Foxit Software
Product
Foxit PDF Editor
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 30, 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=10.1.0.37527

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit PDF Editorversion=10.1.0.37527

Published CVSS scores

7.8Zero Day InitiativeCVSS: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.

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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-787Out-of-bounds Write
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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