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Δ / VULNERABILITY RECORD

CVE-2026-21257.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSHIGH / 8No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Mar 13, 2026

Disclosure summary

Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an authorized attacker to elevate privileges over a network.

Source-reported weakness categories

CWE-77

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

Microsoft Security Updates (CVRF) · 2026-Feb

Open original source · Updated Mar 13, 2026

GitHub Copilot and Visual Studio Elevation of Privilege Vulnerability

Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.

Microsoft maximum product score: 8

VendorProduct / associationVersion / bounds
Microsoft update guideMicrosoft Visual Studio 2022 version 17.14 (MSRC status code 3)
Microsoft update guideMicrosoft Visual Studio 2026 version 18.3 (MSRC status code 3)

Vendor remediation references

  • Release Notes · build 17.14.26 · product IDs 16767
  • Vendor guidance · product IDs 16767
  • Release Notes · build 18.3.0 · product IDs 20843
  • Vendor guidance · product IDs 20843

Original records & references

PUBLISHED 2026-02-10T03:00:00-05:00
MODIFIED 2026-03-13T03:00:00-04:00
INGESTED 2026-10-08T12:45:18-04:00