CVE-2022-42403

Code execution via PDF heap buffer overflow

Published Jan 26, 2023 · Updated Mar 27, 2025

Heap-based buffer overflow in PDF-XChange Editor 9.4.363.0 allows remote attackers to execute code via a crafted PDF file. The PDF parser fails to validate user-controlled length data before copying content into a fixed-length heap buffer. A target must open the malicious file or visit a page that supplies it, after which code runs in the context of the Editor process.

CVSS severity7.8
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in PDF-XChange Editor 9.4.363.0 allows remote attackers to execute code via a crafted PDF file. The PDF parser fails to validate user-controlled length data before copying content into a fixed-length heap buffer. A target must open the malicious file or visit a page that supplies it, after which code runs in the context of the Editor process.

The record

CVE
CVE-2022-42403
Published
Jan 26, 2023
Updated
Mar 27, 2025
Vendor
Tracker Software Products
Product
PDF-XChange Editor
Classifications
CWE-787, CWE-122, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 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=9.4.363.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Tracker Software Products · PDF-XChange Editorversion=9.4.363.0

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.

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-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow
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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