Security readout for executives and security teams
Plain-English summary
This is a high-severity local privilege-escalation issue in firmware for Intel PROSet/Wireless Wi-Fi and Killer Wi-Fi. A person with local access to an affected system could potentially gain higher privileges, risking confidentiality, integrity, and availability on that endpoint.
Executive priority
Treat this as a priority endpoint patching issue, especially for fleets with Intel or Killer wireless adapters. It is not evidenced as internet-remote or actively exploited in the supplied sources, but the potential endpoint impact is high.
Technical view
CVE-2021-0066 is improper input validation (CWE-20) in wireless firmware. CVSS 3.1 is 8.4 with local attack vector, low complexity, no privileges, no user interaction, unchanged scope, and high impact to confidentiality, integrity, and availability.
Likely exposure
Exposure is likely on endpoints running affected Intel PROSet/Wireless Wi-Fi across multiple operating systems, and Killer Wi-Fi on Windows 10 and 11. Exact affected versions are not provided in the source bundle and should be checked against Intel SA-00539.
Exploitation context
The supplied sources do not show CISA KEV listing or active exploitation. The CVSS vector indicates exploitation requires local access, but does not require prior privileges or user interaction.
Researcher notes
Public details in the bundle are limited to CVE metadata, CVSS, CWE-20, affected product families, and Intel advisory reference. Do not assume affected versions, proof-of-concept availability, or fixes beyond Intel SA-00539.
Mitigation direction
- Review Intel SA-00539 for affected versions and vendor-recommended updates.
- Patch affected Intel PROSet/Wireless Wi-Fi and Killer Wi-Fi components through approved channels.
- Prioritize laptops and desktops where local user access is common.
- Track remediation through endpoint management and driver or firmware inventory.
- If updates are unavailable, follow current Intel guidance for compensating controls.
Validation and detection
- Inventory endpoints with Intel PROSet/Wireless Wi-Fi or Killer Wi-Fi components.
- Compare installed wireless driver and firmware versions against Intel SA-00539.
- Flag Killer Wi-Fi deployments on Windows 10 and Windows 11 for review.
- Confirm patch compliance after updates through endpoint management reporting.
- Document unresolved systems and business justification for any deferral.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-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.
Open ATT&CK lookupCVE-2021-0066 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.55.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.4HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00539.htmlCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.