CVE-2021-0071

Privilege escalation via undisclosed UEFI input validation

Published Nov 17, 2021 · Updated Aug 3, 2024

Improper input validation in UEFI firmware for Intel PROSet/Wireless WiFi allows physically proximate attackers to escalate privileges. Intel has not disclosed the affected firmware routine, the untrusted input, or the incorrect validation operation. Intel's prose describes unauthenticated adjacent access, but its published CVSS vector requires local access and high privileges.

CVSS severity6.7
Medium
EPSS probability0.42%
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 UEFI firmware for Intel PROSet/Wireless WiFi allows physically proximate attackers to escalate privileges. Intel has not disclosed the affected firmware routine, the untrusted input, or the incorrect validation operation. Intel's prose describes unauthenticated adjacent access, but its published CVSS vector requires local access and high privileges.

The record

CVE
CVE-2021-0071
Published
Nov 17, 2021
Updated
Aug 3, 2024
Vendor
Intel Corporation
Product
Intel PROSet/Wireless WiFi Software
Classifications
CWE-20, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Nov 17, 2021CVE 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=See references

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Intel Corporation · Intel PROSet/Wireless WiFi Softwareversion=See references

Published CVSS scores

8.8NIST National Vulnerability DatabaseCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.8NIST National Vulnerability DatabaseAV:A/AC:L/Au:N/C:P/I:P/A:P
6.7Intel CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:N/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 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-20Improper Input Validation
T1068Exploitation for Privilege Escalation

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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