CVE-2022-34467Network attack vector

Service interruption via recursive XML entity expansion

Published Jul 12, 2022 · Updated Aug 3, 2024

XML entity expansion in Siemens Mendix Excel Importer before 9.2.2 or 10.1.2 allows remote authenticated users to interrupt service. The Excel import path accepts DTD entities whose recursive expansion consumes unbounded processing resources while parsing a crafted workbook. An authenticated user must reach an application-defined upload and import flow; successful exploitation exhausts the affected component rather than reading or changing data.

CVSS severity6.5
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XML entity expansion in Siemens Mendix Excel Importer before 9.2.2 or 10.1.2 allows remote authenticated users to interrupt service. The Excel import path accepts DTD entities whose recursive expansion consumes unbounded processing resources while parsing a crafted workbook. An authenticated user must reach an application-defined upload and import flow; successful exploitation exhausts the affected component rather than reading or changing data.

The record

CVE
CVE-2022-34467
Published
Jul 12, 2022
Updated
Aug 3, 2024
Vendor
Siemens
Product
Mendix Excel Importer
Classifications
CWE-776, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2022CVE 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=All versions < V10.1.2
  2. Affected versionversion=All versions < V9.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Siemens · Mendix Excel Importerversion=All versions < V10.1.2; version=All versions < V9.2.2

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-776Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
T1499.004Application or System Exploitation

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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