CVE-2021-33146Network attack vector

Unauthenticated information disclosure

Published May 16, 2024 · Updated Aug 3, 2024

Improper input validation in Intel Ethernet Adapters and I225 manageability firmware allows remote attackers to disclose information. Intel has not published the affected packet or command, the validation failure, or what information the firmware returns. Network access to an affected adapter is sufficient and requires neither authentication nor user interaction; the reported impact is limited to information disclosure.

CVSS severity5.3
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Intel Ethernet Adapters and I225 manageability firmware allows remote attackers to disclose information. Intel has not published the affected packet or command, the validation failure, or what information the firmware returns. Network access to an affected adapter is sufficient and requires neither authentication nor user interaction; the reported impact is limited to information disclosure.

The record

CVE
CVE-2021-33146
Published
May 16, 2024
Updated
Aug 3, 2024
Vendor
Topcon Positioning Systems, Inc.
Product
Intel Ethernet Adapter Complete Driver Pack
Classifications
CWE-20, CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 2024CVE 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=0 <29.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Topcon Positioning Systems, Inc. · Intel Ethernet Adapter Complete Driver Packversion=0 <29.0.1
Topcon Positioning Systems, Inc. · Intel Ethernet Controller I225 Manageability Firmwareversion=0 <nvm_version_1.87

Published CVSS scores

5.3Intel CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-200Exposure of Sensitive Information to an Unauthorized Actor

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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