CVE-2026-21256HighMicrosoft CVSS 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2026-21256 — Microsoft Visual Studio

Published
February 10, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-21256 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21256. This page also shows what EchelonGraph holds for CVE-2026-21256, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products2

  • Microsoft Visual Studio 2022 version 17.14
  • Microsoft Visual Studio 2026 version 18.3

✅ Updates Microsoft lists: 2 updates

2 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
—Security Update17.14.26
—Security Update18.3.0

🧭 EchelonGraph on CVE-2026-21256

EchelonGraph score
8.8 HIGH
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

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

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2026-21256, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (5)