Security readout for executives and security teams
Plain-English summary
This vulnerability affects Microsoft Windows Media Foundation Core and can allow code execution after user interaction. The source data rates it high severity because successful exploitation could compromise confidentiality, integrity, and availability. There is no provided evidence of active exploitation or CISA KEV listing.
Executive priority
Treat as high priority for endpoint patch governance. It requires user interaction, but successful exploitation could give an attacker broad system impact on affected Windows devices.
Technical view
CVE-2021-31192 is a Windows Media Foundation Core remote code execution issue with CVSS 3.1 score 7.8. The vector indicates local attack path, low complexity, no privileges required, and required user interaction, with high impact across confidentiality, integrity, and availability.
Likely exposure
Exposure is most likely on Microsoft Windows 10 Version 2004 and Windows 10 Version 20H2 systems listed in the source bundle, especially where users process media content through Windows Media Foundation components.
Exploitation context
The source bundle does not show active exploitation. KEV status is false. CVSS exploit maturity is listed as unproven, and the vector requires user interaction, reducing automation but not business impact.
Researcher notes
The affected-product data in the bundle is limited and should be reconciled with MSRC before scoping broadly. Do not infer affected versions beyond Windows 10 Version 2004 and 20H2 from this bundle alone.
Mitigation direction
- Check Microsoft MSRC guidance for the official update or mitigation.
- Prioritize affected Windows 10 2004 and 20H2 endpoints.
- Reduce handling of untrusted media until systems are remediated.
- Confirm endpoints are on supported, fully updated Windows builds.
Validation and detection
- Inventory Windows 10 2004 and 20H2 assets.
- Compare installed patch levels against Microsoft MSRC guidance.
- Confirm vulnerable systems can process media content through WMF paths.
- Track remediation evidence in endpoint management tooling.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-31192 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/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:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/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-2021-31192CVE 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.