Security readout for executives and security teams
Plain-English summary
CVE-2021-31182 is a high-severity spoofing flaw in the Microsoft Bluetooth Driver. A nearby attacker could potentially abuse Bluetooth-related trust on affected Windows systems. Business risk is highest where older Windows clients or servers with Bluetooth capability remain unpatched. The provided sources do not show active exploitation.
Executive priority
Treat this as a high-priority patch management issue for older Windows estates, not as confirmed active exploitation. Prioritize systems with Bluetooth capability, legacy operating systems, and devices used in sensitive environments where nearby attacker presence is plausible.
Technical view
The CVSS v3.1 vector is 7.1: adjacent attack vector, low complexity, no privileges, no user interaction, unchanged scope, low confidentiality impact, high integrity impact, and no availability impact. Affected products include multiple Windows 10, Windows 7, Windows 8.1, Windows Server 2012 R2, 2016, and 2019 releases.
Likely exposure
Exposure is most plausible on affected Windows endpoints or servers with Bluetooth driver functionality present, especially legacy or long-lived builds. The adjacent attack vector means the attacker must be near the target’s Bluetooth environment rather than reaching it directly over the internet.
Exploitation context
The bundle marks KEV as false and provides no cited evidence of active exploitation. The CVSS data indicates exploitation would not require credentials or user interaction, but would require adjacent access. Do not assume internet-scale exploitation from the provided evidence.
Researcher notes
The source bundle lacks CWE detail, exploit references, and specific KB mappings. Analysis should stay close to MSRC and CVSS evidence: adjacent vector, spoofing class, no privileges, no user interaction, high integrity impact, and no confirmed KEV status.
Mitigation direction
- Review Microsoft’s MSRC advisory for CVE-2021-31182.
- Apply the official Microsoft security updates for affected Windows versions.
- Prioritize legacy Windows and Bluetooth-enabled endpoints.
- Retire unsupported Windows versions where security updates are unavailable.
- Document compensating controls if patching is delayed.
Validation and detection
- Inventory Windows versions listed as affected in the source bundle.
- Check endpoint patch status against Microsoft guidance for this CVE.
- Identify systems with Bluetooth hardware or drivers enabled.
- Confirm no exposed legacy Windows builds remain unmanaged.
- Track exceptions with owner, deadline, and compensating control.
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.
CVE-2021-31182 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
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C
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:L/I:H/A:N/E:U/RL:O/RC:C2.84.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31182CVE 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.