Security readout for executives and security teams
Plain-English summary
This is a local privilege-escalation risk in firmware for some Intel PROSet/Wireless Wi-Fi and Killer Wi-Fi products. An attacker already needs privileged local access, so this is not a remote internet-facing issue. The concern is post-compromise escalation on affected laptops or workstations.
Executive priority
Treat as a standard endpoint remediation item, not an emergency internet exposure. Prioritize affected executive, developer, and administrator laptops because the impact after local compromise can be broad.
Technical view
CVE-2021-0166 is a CWE-200 sensitive-information exposure in wireless firmware. The CVSS 3.1 vector is AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, scored 6.7. Sources identify affected Intel PROSet/Wireless Wi-Fi across multiple operating systems and some Killer Wi-Fi on Windows 10 and 11.
Likely exposure
Exposure is most likely on managed endpoints using the affected Intel or Killer Wi-Fi products. Servers and cloud systems are unlikely to be relevant unless they use the affected wireless firmware.
Exploitation context
The provided sources do not show KEV listing or active exploitation. Exploitation requires local access and high privileges, making this mainly useful after an attacker already has a foothold.
Researcher notes
Evidence is limited to the CVE record and Intel advisory reference. The affected-version details are deferred to Intel SA-00539, so validation should start there. Do not assume all Intel or Killer Wi-Fi products are affected.
Mitigation direction
- Review Intel SA-00539 for exact affected products and vendor guidance.
- Apply Intel or OEM firmware and driver guidance after confirming applicability.
- Prioritize laptops and workstations with affected Intel or Killer Wi-Fi hardware.
- Reduce unnecessary local administrator access on endpoint fleets.
Validation and detection
- Inventory endpoints for Intel PROSet/Wireless and Killer Wi-Fi hardware.
- Compare installed firmware and driver versions against Intel SA-00539.
- Check vulnerability scanner findings for CVE-2021-0166 on endpoint assets.
- Review whether local privileged access is tightly controlled.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2021-0166 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
- Medium
- CVSS
- 6.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/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:H/UI:N/S:U/C:H/I:H/A:H0.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.7MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.