CVE-2025-66494

Code execution via stale PDF object dereference

Published Dec 19, 2025 · Updated Dec 19, 2025

Use-after-free in Foxit PDF Reader and PDF Editor 2025.2.1, 14.0.1, and 13.2.1 and earlier allows remote attackers to execute code. During PDF parsing, multiple parent objects manage the same PDF object; one parent frees it while another retains and later dereferences the stale reference. Exploitation requires a user to open a malicious PDF or visit a malicious page, and successful code runs in the current process.

CVSS severity7.8
High
EPSS probability0.30%
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 Foxit PDF Reader and PDF Editor 2025.2.1, 14.0.1, and 13.2.1 and earlier allows remote attackers to execute code. During PDF parsing, multiple parent objects manage the same PDF object; one parent frees it while another retains and later dereferences the stale reference. Exploitation requires a user to open a malicious PDF or visit a malicious page, and successful code runs in the current process.

The record

CVE
CVE-2025-66494
Published
Dec 19, 2025
Updated
Dec 19, 2025
Vendor
Foxit Software
Product
Foxit PDF Reader
Classifications
CWE-416, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 19, 2025Record 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 13.2.1 and eariler
  2. Affected versionversion=Versions 14.0.1 and earlier
  3. Affected versionversion=Versions 2025.2.1 and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit PDF Readerversion=Versions 13.2.1 and eariler; version=Versions 14.0.1 and earlier; version=Versions 2025.2.1 and earlier
Foxit Software · Foxit PDF Editorversion=Versions 13.2.1 and eariler; version=Versions 14.0.1 and earlier; version=Versions 2025.2.1 and earlier

Published CVSS scores

7.8FoxitCVSS: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 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
T1204.002User Execution: Malicious 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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