CVE-2021-33115

Unauthenticated privilege escalation via adjacent access

Published Feb 9, 2022 · Updated May 5, 2025

Improper input validation in Intel PROSet/Wireless WiFi UEFI drivers before 1.2.8.21337 allows remote attackers to escalate privileges. Intel has not published the specific UEFI driver locus, input, or validation operation responsible for the flaw. Exploitation requires adjacent wireless access, no authentication, and high attack complexity; success compromises confidentiality and integrity without interrupting availability.

CVSS severity6.8
Medium
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper input validation in Intel PROSet/Wireless WiFi UEFI drivers before 1.2.8.21337 allows remote attackers to escalate privileges. Intel has not published the specific UEFI driver locus, input, or validation operation responsible for the flaw. Exploitation requires adjacent wireless access, no authentication, and high attack complexity; success compromises confidentiality and integrity without interrupting availability.

The record

CVE
CVE-2021-33115
Published
Feb 9, 2022
Updated
May 5, 2025
Vendor
Intel Corporation
Product
Intel PROSet/Wireless WiFi Software
Classifications
CWE-20, T1068
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2022CVE publishedPublication date reported by the CVE source.
  2. May 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 vectoradjacent
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

6.8Intel CorporationCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
8.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.8NIST NVDAV:A/AC:L/Au:N/C:P/I:P/A:P

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)
Vectoradjacent
Privilegesunauthenticated
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo