Security readout for executives and security teams
Plain-English summary
This CVE describes a high-severity remote code execution issue in Microsoft Visual Studio Code. Exploitation requires local user interaction, but successful exploitation could significantly affect confidentiality, integrity, and availability. The provided sources do not show CISA KEV listing or active exploitation.
Executive priority
Treat as high priority for developer endpoint hygiene, especially where staff handle external code or files. It is not KEV-listed in the supplied evidence, but the potential impact is severe if triggered.
Technical view
CVSS 3.1 is 7.8 with AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. The bundle lists Microsoft Visual Studio Code as affected and references MSRC. The CVSS vector indicates an official fix exists, but the supplied evidence does not name a fixed version or mitigation details.
Likely exposure
Exposure is most likely on developer workstations or build environments running affected Visual Studio Code. The source bundle identifies Visual Studio Code but gives limited version detail, so asset inventory should be compared against the MSRC advisory.
Exploitation context
The CVSS vector requires local access and user interaction, with no privileges required. KEV is false in the bundle, and exploit maturity is marked unproven, so active exploitation is not established by the provided evidence.
Researcher notes
Do not assume affected version scope beyond the provided sources. The CVSS fields show local attack vector, required user interaction, and full CIA impact. Use MSRC as the authoritative source for exact version and remediation details.
Mitigation direction
- Review Microsoft MSRC guidance for the exact affected and fixed VS Code versions.
- Update Visual Studio Code to a vendor-supported fixed release where applicable.
- Prioritize developer endpoints that open untrusted workspaces, files, or extensions.
- Apply normal endpoint controls for developer machines until remediation is confirmed.
Validation and detection
- Inventory installed Visual Studio Code versions across developer and build systems.
- Compare discovered versions against the MSRC advisory for CVE-2021-31211.
- Confirm remediation status after updates through endpoint management records.
- Check whether vulnerable systems handle untrusted project files or repositories.
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-2021-31211 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-2021-31211CVE 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.