CVE-2021-34606Public exploit

Local code execution via unqualified DLL loading

Published May 11, 2022 · Updated Sep 16, 2024

DLL search-path hijacking in Wuxi Xinje XDPPro 3.5.1 and earlier allows local users to execute code through a planted DNSAPI.dll. XDPPro.exe calls LoadLibrary for DNSAPI.dll without a fully qualified path, searches its Program Files installation directory first, and loads an attacker-planted copy instead of the system library. Exploitation requires local file-write access and a user to open a project; the malicious DLL then runs with that user's account privileges.

CVSS severity7.3
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DLL search-path hijacking in Wuxi Xinje XDPPro 3.5.1 and earlier allows local users to execute code through a planted DNSAPI.dll. XDPPro.exe calls LoadLibrary for DNSAPI.dll without a fully qualified path, searches its Program Files installation directory first, and loads an attacker-planted copy instead of the system library. Exploitation requires local file-write access and a user to open a project; the malicious DLL then runs with that user's account privileges.

The record

CVE
CVE-2021-34606
Published
May 11, 2022
Updated
Sep 16, 2024
Vendor
Wuxi Xinje Electric Co., Ltd.
Product
XDPPro
Classifications
CWE-427, T1574.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=unspecified <=v3.5.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Wuxi Xinje Electric Co., Ltd. · XDPProversion=unspecified <=v3.5.1

Published CVSS scores

7.3NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
6.9NVDAV:L/AC:M/Au:N/C:C/I:C/A:C
7.3CERT@VDECVSS:3.1/AV:L/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1574.002DLL Side-Loading

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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