CVE-2020-0522

Privileged local service interruption

Published Feb 17, 2021 · Updated Aug 4, 2024

Improper initialization in Intel Ethernet I210 Controller firmware before 3.30 allows local users with high privileges to interrupt service. Intel has not disclosed the initialization locus, the affected firmware state, or the operation that triggers the failure. Exploitation requires local high-privilege access; public material does not specify whether the resulting interruption is a hang, crash, or adapter reset.

CVSS severity6.7
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper initialization in Intel Ethernet I210 Controller firmware before 3.30 allows local users with high privileges to interrupt service. Intel has not disclosed the initialization locus, the affected firmware state, or the operation that triggers the failure. Exploitation requires local high-privilege access; public material does not specify whether the resulting interruption is a hang, crash, or adapter reset.

The record

CVE
CVE-2020-0522
Published
Feb 17, 2021
Updated
Aug 4, 2024
Vendor
Intel Corporation
Product
Intel Ethernet I210 Controller Firmware
Classifications
CWE-665, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

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  1. Affected versionversion=before version 3.30

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Intel Corporation · Intel Ethernet I210 Controller Firmwareversion=before version 3.30

Published CVSS scores

6.7Intel CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H
2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:N/A:P
4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-665Improper Initialization
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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