Security readout for executives and security teams
Plain-English summary
CVE-2021-0172 is a Wi-Fi firmware flaw in some Intel PROSet/Wireless and Killer Wi-Fi products. A nearby unauthenticated attacker could potentially disrupt wireless availability. The known impact is denial of service, not data theft or system compromise, but affected laptops or endpoints in exposed wireless environments may lose connectivity.
Executive priority
Handle through normal vulnerability management with attention to mobile and public-facing wireless use cases. This is not shown as actively exploited in the provided evidence, but it can affect endpoint availability and user productivity where vulnerable Wi-Fi hardware is deployed.
Technical view
The issue is improper input validation, CWE-20, in firmware for some Intel PROSet/Wireless Wi-Fi across multiple operating systems and some Killer Wi-Fi on Windows 10 and 11. CVSS 3.1 is 6.5 with adjacent network access, low complexity, no privileges, no user interaction, and high availability impact only.
Likely exposure
Exposure is most relevant to endpoints using affected Intel PROSet/Wireless Wi-Fi or Killer Wi-Fi components, especially devices operating in shared, public, or physically accessible wireless spaces. The source bundle does not provide affected version details; Intel’s advisory must be checked for exact product and version scope.
Exploitation context
The CVE describes adjacent access, meaning the attacker must be near enough to interact with the wireless environment. There is no KEV listing in the provided bundle and no cited evidence of active exploitation. Treat this as an availability risk until vendor-specific exposure is confirmed.
Researcher notes
Public details are limited in the provided bundle. The CVE record identifies firmware input validation and adjacent denial of service only. Avoid assuming confidentiality, integrity, remote internet exposure, or weaponized exploit availability without additional sourced evidence.
Mitigation direction
- Review Intel SA-00539 for affected adapters, versions, and vendor update guidance.
- Inventory endpoints using Intel PROSet/Wireless Wi-Fi or Killer Wi-Fi components.
- Prioritize remediation for mobile devices used in public or shared wireless areas.
- Where feasible, disable unused Wi-Fi interfaces on high-value systems pending vendor guidance.
Validation and detection
- Compare installed Wi-Fi driver and firmware versions against Intel SA-00539.
- Confirm Windows 10 and 11 systems with Killer Wi-Fi are included in review.
- Confirm non-Windows Intel PROSet/Wireless systems are included in review.
- Track unexplained Wi-Fi availability incidents, without treating them as proof of exploitation.
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-2021-0172 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.