Security readout for executives and security teams
Plain-English summary
CVE-2021-31184 is a Windows Infrared Data Association information disclosure issue. The main business concern is exposure of sensitive information on affected Windows systems, not system takeover or service outage. It requires local low-privileged access, so it is most urgent where endpoint compromise or shared-user systems are plausible.
Executive priority
Schedule remediation through normal vulnerability management, with higher priority for sensitive endpoints, servers, and shared systems. This is not a critical emergency based on the supplied evidence, but confidentiality impact is high if an attacker already has local access.
Technical view
The CVSS 3.1 vector is 5.5: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. It affects multiple Windows client and server versions and impacts confidentiality only. Microsoft lists official remediation status as available, but the provided bundle does not include specific KB identifiers or technical root cause details.
Likely exposure
Exposure is limited to affected Windows versions where a low-privileged local user or process can access the vulnerable IrDA component. The provided sources do not indicate network exploitation or unauthenticated remote exposure.
Exploitation context
The bundle marks exploit maturity as unproven and KEV is false. There is no cited evidence of active exploitation. Treat it as a local post-access information disclosure risk rather than an initial-access vulnerability.
Researcher notes
The source bundle provides severity, affected products, CVSS vector, KEV=false, and Microsoft advisory linkage. It does not provide root cause, vulnerable functions, proof-of-concept status beyond unproven exploit maturity, or specific KB-level fixes.
Mitigation direction
- Apply Microsoft security updates applicable to CVE-2021-31184.
- Check the MSRC advisory for exact product and update applicability.
- Prioritize systems handling sensitive data or shared-user workloads.
- Bring affected Windows versions into managed patch compliance.
- Review unsupported or hard-to-patch systems for compensating controls.
Validation and detection
- Inventory Windows versions and builds against the affected product list.
- Confirm patch deployment status for CVE-2021-31184 in patch management records.
- Review MSRC guidance for product-specific update applicability.
- Verify high-value endpoints and servers are not missing relevant Microsoft updates.
- Document any exceptions and compensating controls for delayed remediation.
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-2021-31184 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-2021-31184CVE 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.