CVE-2021-33118

Local privilege escalation

Published Nov 17, 2021 · Updated Aug 3, 2024

Privilege escalation in Intel Serial IO Driver for Intel NUC 11 Gen before 30.100.2104.1 allows local users to gain elevated privileges. Intel identifies improper access control in the software installer but has not disclosed the affected operation or access-control failure. Exploitation requires low-privileged local access, high attack complexity, and user interaction, and successful exploitation compromises the host.

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

Privilege escalation in Intel Serial IO Driver for Intel NUC 11 Gen before 30.100.2104.1 allows local users to gain elevated privileges. Intel identifies improper access control in the software installer but has not disclosed the affected operation or access-control failure. Exploitation requires low-privileged local access, high attack complexity, and user interaction, and successful exploitation compromises the host.

The record

CVE
CVE-2021-33118
Published
Nov 17, 2021
Updated
Aug 3, 2024
Vendor
Intel
Product
Intel Serial IO Driver for Intel NUC 11 Gen
Classifications
T1068
Attack vector
local
Privileges
authenticated

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=before version 30.100.2104.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Intel · Intel Serial IO Driver for Intel NUC 11 Genversion=before version 30.100.2104.1

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.7IntelCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
4.6NVDAV:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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