CVE-2026-21256HIGH 8.8EPSS p61.4%

CVE-2026-21256CVE-2026-21256

Description

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.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS1.10% probability of exploitation · percentile 61.4% · 2026-06-18T12:00:27Z
Published2026-02-10
Last modified2026-02-11

Underlying weaknesses· 2

CWE-77CWE-94

References

  1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21256

2

TypeTargetConfidenceTier
WeaknessImproper Neutralization of Special Elements used in a Command ('Command Injection')cwe-770%live
WeaknessImproper Control of Generation of Code ('Code Injection')cwe-940%live

Related by meaning· 6

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.