CVE-2026-3779Public exploit

Code execution via freed list-box calculation array

Published Apr 1, 2026 · Updated Apr 1, 2026

Use-after-free in Foxit PDF Editor and PDF Reader allows attackers to execute arbitrary code through a crafted PDF containing JavaScript. A calculation callback can call deletePages(), freeing the list-box value array, after which the calculation path reuses that array without validating its lifetime. Execution requires a user to open the malicious document; successful memory corruption runs code in the application's security context.

CVSS severity7.8
High
EPSS probability0.34%
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 Editor and PDF Reader allows attackers to execute arbitrary code through a crafted PDF containing JavaScript. A calculation callback can call deletePages(), freeing the list-box value array, after which the calculation path reuses that array without validating its lifetime. Execution requires a user to open the malicious document; successful memory corruption runs code in the application's security context.

The record

CVE
CVE-2026-3779
Published
Apr 1, 2026
Updated
Apr 1, 2026
Vendor
Foxit Software
Product
Foxit PDF Reader
Classifications
CWE-416, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 2026Record 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 2025.3 and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit PDF Readerversion=Versions 2025.3 and earlier
Foxit Software · Foxit PDF Editorversion=Versions 13.2.2 and earlier; version=Versions 14.0.2 and earlier; version=Versions 2025.3 and earlier

Published CVSS scores

7.8Foxit SoftwareCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8Cisco TalosCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution

Public exploit references

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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