CVE-2021-26254

Privileged service interruption via out-of-bounds read

Published Aug 18, 2022 · Updated May 5, 2025

Out-of-bounds read in Intel PROSet/Wireless WiFi and Killer WiFi software allows privileged local users to interrupt service via local access. Intel has not disclosed the affected driver routine or the input that reaches beyond a valid buffer boundary. Exploitation requires high local privileges on a Windows 10 or 11 host with a supported Intel or Killer WiFi adapter, and the bounded impact is a service interruption rather than data disclosure or modification.

CVSS severity6.0
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Intel PROSet/Wireless WiFi and Killer WiFi software allows privileged local users to interrupt service via local access. Intel has not disclosed the affected driver routine or the input that reaches beyond a valid buffer boundary. Exploitation requires high local privileges on a Windows 10 or 11 host with a supported Intel or Killer WiFi adapter, and the bounded impact is a service interruption rather than data disclosure or modification.

The record

CVE
CVE-2021-26254
Published
Aug 18, 2022
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 18, 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

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.0IntelCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/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.

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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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