CVE-2024-9497

Privilege escalation via installer DLL search path

Published Jan 24, 2025 · Updated Aug 27, 2025

DLL hijacking in Silicon Labs USBXpress 4 SDK 4.0.3 and earlier allows local users to execute code through the Windows installer. The installer resolves a required DLL through an uncontrolled search-path element and loads an attacker-supplied library instead of the intended code. Exploitation requires a user to run the impacted installer; the loaded code executes with the installer's privileges, enabling privilege escalation.

CVSS severity8.6
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DLL hijacking in Silicon Labs USBXpress 4 SDK 4.0.3 and earlier allows local users to execute code through the Windows installer. The installer resolves a required DLL through an uncontrolled search-path element and loads an attacker-supplied library instead of the intended code. Exploitation requires a user to run the impacted installer; the loaded code executes with the installer's privileges, enabling privilege escalation.

The record

CVE
CVE-2024-9497
Published
Jan 24, 2025
Updated
Aug 27, 2025
Vendor
Sigma Designs
Product
USBXpress 4 SDK
Classifications
CWE-427, CAPEC-471, CAPEC-30, T1574.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 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=0 <=4.0.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Sigma Designs · USBXpress 4 SDKversion=0 <=4.0.3

Published CVSS scores

8.6Silicon LabsCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/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-427Uncontrolled Search Path Element
CAPEC-471Search Order Hijacking
CAPEC-30Hijacking a Privileged Thread of Execution
T1574.001Hijack Execution Flow: DLL

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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