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CVE Record

CVE-2021-23223: Improper initialization for some Intel(R) PROSet/Wireless WiFi and Killer(TM) WiFi products may allow a pri...

Improper initialization for some Intel(R) PROSet/Wireless WiFi and Killer(TM) WiFi products may allow a privileged user to potentially enable escalation of privilege via local access.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This issue affects some Intel PROSet/Wireless WiFi and Killer WiFi products. A local user who already has some privileges could potentially gain higher privileges on the device. It is not a remote internet attack, but it matters on endpoints where local account compromise is plausible.

Executive priority

Treat as a high-priority endpoint hardening issue, especially for fleets with Intel wireless components. It is less urgent than remotely exploitable perimeter flaws, but it can increase blast radius after phishing, malware, or insider misuse.

Technical view

CVE-2021-23223 is an improper initialization flaw, mapped to CWE-665, with CVSS 3.1 score 7.8. The vector is local, low complexity, low privileges required, no user interaction, unchanged scope, with high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is most likely on endpoints using affected Intel PROSet/Wireless WiFi or Killer WiFi components. The bundle does not list exact affected versions, so teams must compare installed versions against Intel SA-00621 and applicable Linux firmware guidance.

Exploitation context

The bundle provides no evidence of known active exploitation, and CISA KEV is false. Exploitation requires local access and an already privileged or low-privileged local user context, limiting mass remote exposure but increasing risk after initial endpoint compromise.

Researcher notes

The public bundle lacks exact affected version ranges and detailed root-cause mechanics beyond improper initialization. Avoid assuming exploitability across all Intel wireless products. Validation should be version-driven using Intel SA-00621 and the Debian LTS advisory.

Mitigation direction

  • Review Intel SA-00621 for affected products and vendor update guidance.
  • Apply Intel-provided updates for affected PROSet/Wireless WiFi or Killer WiFi components.
  • For Debian LTS systems, review and apply DLA 3380-1 firmware-nonfree updates where applicable.
  • Prioritize remediation on shared, high-value, or frequently compromised endpoints.

Validation and detection

  • Inventory systems with Intel PROSet/Wireless WiFi or Killer WiFi components.
  • Compare installed driver, software, or firmware versions with Intel SA-00621.
  • Confirm Debian systems have relevant firmware-nonfree security updates installed.
  • Document exceptions where affected hardware exists but vendor guidance is unavailable.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-665: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2021-23223 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2021-23223Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aIntel(R) PROSet/Wireless WiFi and Killer(TM) WiFi productsSee referencesListed
Weakness

CWE details

CWE-665

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-665 · source CWE mapping

Improper Initialization

Improper Initialization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs