CVE-2022-42405

Code execution via unchecked EMF length

Published Jan 26, 2023 · Updated Mar 31, 2025

Heap-based buffer overflow in PDF-XChange Editor 9.4.362.0 allows remote attackers to execute code through a crafted EMF file. The EMF parser copies attacker-controlled data into a fixed-length heap buffer without first validating that the supplied length fits. Exploitation requires a user to visit a malicious page or open the file, and resulting code runs in the current process.

CVSS severity7.8
High
EPSS probability0.36%
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 9.4.362.0 allows remote attackers to execute code through a crafted EMF file. The EMF parser copies attacker-controlled data into a fixed-length heap buffer without first validating that the supplied length fits. Exploitation requires a user to visit a malicious page or open the file, and resulting code runs in the current process.

The record

CVE
CVE-2022-42405
Published
Jan 26, 2023
Updated
Mar 31, 2025
Vendor
Tracker Software Products
Product
PDF-XChange Editor
Classifications
CWE-787, CWE-122, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 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=9.4.362.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Tracker Software Products · PDF-XChange Editorversion=9.4.362.0

Published CVSS scores

7.8NISTCVSS: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
T1204.002User Execution: Malicious File
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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