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CVE Record

CVE-2021-0076: Improper Validation of Specified Index, Position, or Offset in Input in firmware for some Intel(R) PROSet/W...

Improper Validation of Specified Index, Position, or Offset in Input in firmware for some Intel(R) PROSet/Wireless Wi-Fi in multiple operating systems and some Killer(TM) Wi-Fi in Windows 10 and 11 may allow a privileged user to potentially enable denial of service via local access.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-0076 is a local denial-of-service issue in firmware for some Intel PROSet/Wireless Wi-Fi and some Killer Wi-Fi devices. An attacker already holding local privileged access could disrupt availability. The supplied sources do not show remote exploitation or active exploitation.

Executive priority

Treat as a moderate endpoint hygiene issue, not an emergency internet-facing incident. Prioritize validation and vendor-guided updates during normal patch cycles, with faster handling for shared or high-value workstations.

Technical view

The issue is improper input validation of an index, position, or offset in affected Wi-Fi firmware. CVSS 3.1 is 5.5: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. Impact is availability-only denial of service, requiring local access and privileges.

Likely exposure

Likely exposure is endpoint or workstation fleets using affected Intel PROSet/Wireless Wi-Fi firmware across multiple operating systems, or affected Killer Wi-Fi on Windows 10 and 11. Exact affected versions are not included in the provided bundle.

Exploitation context

CISA KEV status is false in the source bundle, and no cited source reports active exploitation. The attack scenario requires a local privileged user, which reduces broad external risk but matters on shared, kiosk, lab, or already-compromised endpoints.

Researcher notes

The public bundle names the affected product family but does not provide version tables, patch identifiers, or detailed root-cause information. Analysis should stay tied to Intel SA-00539 and local availability impact only.

Mitigation direction

  • Review Intel SA-00539 for exact affected versions and vendor guidance.
  • Inventory endpoints with Intel PROSet/Wireless Wi-Fi or Killer Wi-Fi hardware.
  • Apply applicable Intel or OEM wireless firmware and driver updates per vendor guidance.
  • Prioritize shared systems and endpoints with elevated local user access.

Validation and detection

  • Compare installed wireless driver and firmware versions against Intel SA-00539.
  • Confirm whether Windows 10 or 11 systems use Killer Wi-Fi components.
  • Check asset inventory for Intel PROSet/Wireless Wi-Fi across operating systems.
  • Verify update deployment through endpoint management or vendor tooling.
Prepared
Confidence
medium
Sources
3

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

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cwe · low confidence lookup

CWE-20: 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-2021-0076 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
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
2Source 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
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2021-0076Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 Wi-Fi in multiple operating systems and some Killer(TM) Wi-Fi in Windows 10 and 11See referencesListed
Weakness

CWE details

CWE-20

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

CWE-20 · source CWE mapping

Improper Input Validation

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

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