Security readout for executives and security teams
Plain-English summary
CVE-2021-33110 is a Bluetooth driver issue affecting some Intel Wireless Bluetooth and Killer Bluetooth products on Windows 10 and 11 before version 22.80. A nearby unauthenticated attacker could potentially cause denial of service. The known impact is availability, not data theft or privilege escalation.
Executive priority
Treat this as a routine but real endpoint availability fix. It does not indicate data compromise, remote internet exposure, or known active exploitation in the supplied sources, but affected Bluetooth-enabled laptops should be updated through normal patch management.
Technical view
The CVE describes improper input validation, CWE-20, in affected Intel and Killer Bluetooth products on Windows 10 and 11 before 22.80. CVSS 3.1 is 6.5 with adjacent attack vector, low complexity, no privileges, no user interaction, unchanged scope, and high availability impact only.
Likely exposure
Exposure is most likely on Windows 10 or 11 endpoints using affected Intel Wireless Bluetooth or Killer Bluetooth products with driver/software versions earlier than 22.80. Systems without those products, or already on 22.80 or later, are not identified as affected in the supplied sources.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The attack vector is adjacent, meaning the attacker must be near enough to interact with the Bluetooth target. The documented outcome is potential denial of service.
Researcher notes
Evidence is limited to the CVE record and Intel advisory reference. Do not infer broader Bluetooth stack exposure, exploit availability, or impacts beyond denial of service. Validation should focus on affected Intel/Killer Bluetooth products, Windows 10/11, and versions before 22.80.
Mitigation direction
- Review Intel advisory INTEL-SA-00581 for applicability and vendor instructions.
- Update affected Windows Bluetooth driver packages to version 22.80 or later.
- Prioritize systems where Bluetooth is enabled and availability is business-critical.
- Use Intel or OEM-supported driver distribution channels.
- Track exceptions where affected systems cannot be updated promptly.
Validation and detection
- Inventory Windows 10 and 11 systems with Intel or Killer Bluetooth products.
- Verify installed Bluetooth driver/software version is 22.80 or later.
- Confirm the specific hardware is covered by Intel advisory INTEL-SA-00581.
- Review endpoint telemetry for Bluetooth-related crashes or availability incidents.
- Document non-applicable systems to avoid unnecessary remediation work.
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-2021-33110 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-00581.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.