Security readout for executives and security teams
Plain-English summary
CVE-2021-28457 is a Microsoft Visual Studio Code remote code execution vulnerability. The available source data rates it high severity, with potential full confidentiality, integrity, and availability impact if triggered. It requires user interaction and local attack context, so urgency centers on developer workstations and users who open untrusted projects or files.
Executive priority
Treat this as a high-priority endpoint remediation item for developer environments. It is not KEV-backed in the supplied evidence, but the impact rating is severe enough to justify timely patch tracking and exposure verification.
Technical view
The CVSS 3.1 vector is 7.8 high: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. The source bundle identifies Microsoft Visual Studio Code as affected and indicates official remediation is available through MSRC, but does not provide exploit mechanics, vulnerable code paths, or exact fixed version details.
Likely exposure
Exposure is most likely on endpoints where Microsoft Visual Studio Code is installed and not updated according to Microsoft guidance. Developer machines are the primary concern. The bundle does not identify affected operating systems, extensions, workspace types, or enterprise deployment channels.
Exploitation context
The CVE is not listed as KEV in the supplied bundle. The CVSS exploit code maturity is unproven, and no cited source here supports active exploitation. User interaction is required, so risk depends on users opening attacker-influenced content.
Researcher notes
Source evidence is sparse. The bundle provides CVSS, product identification, MSRC reference, and non-KEV status, but not root cause, exploit preconditions beyond CVSS, or fixed build details. Avoid claims about exploitation or specific payload triggers without additional vendor data.
Mitigation direction
- Review Microsoft MSRC guidance for CVE-2021-28457.
- Update Visual Studio Code using the vendor-supported fixed release path.
- Prioritize developer workstations and shared build or analysis systems.
- Limit opening untrusted projects or files until remediation is confirmed.
- Track remediation through endpoint software inventory.
Validation and detection
- Inventory installed Microsoft Visual Studio Code versions across endpoints.
- Compare findings with the MSRC advisory for CVE-2021-28457.
- Confirm patched installations through device management or software inventory data.
- Identify users or teams handling untrusted code or files.
- Document any systems that cannot be updated immediately.
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-2021-28457 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-2021-28457CVE 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.