February 2026 Patch TuesdayMSRC-2026-02-developer-tools-release-notesNormal patch window

Microsoft · MSRC-2026-02-developer-tools-release-notes

Linked CVE review

Deploy Microsoft Developer Tools update for Visual Studio Code

Linked CVEs: 2
Confirmed exploited: 0
PoC or lab evidence: 0
Maximum CVSS: 8.8

Evidence is kept separate

Confirmed exploitation, public exploit material, EPSS probability and CVSS severity answer different questions. “No confirmation recorded” means the checked sources do not currently confirm exploitation. It is not proof that exploitation has not occurred.

2 of 2 linked CVEs shown

Confirmed exploitedCVSS above 9.0

CVE and description	Severity	Exploit reality	Forecast and access	Remediation
CVE-2026-21518 Scheduled assessment GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.	8.8 · CVSS 3.1 · HighSource: CNA	No confirmation recordedNo CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.	EPSS: 1.44% · 72.3th percentileForecast date: 2026-10-05NETWORK · LOW complexity · NONE privileges · REQUIRED user interaction	Within 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Awaiting fix. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-21523 Scheduled assessment GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability Time-of-check time-of-use (toctou) race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network.	8.0 · CVSS 3.1 · HighSource: CNA	No confirmation recordedNo CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.	EPSS: 0.82% · 55.9th percentileForecast date: 2026-10-05NETWORK · LOW complexity · LOW privileges · REQUIRED user interaction	Within 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Awaiting fix. No fixed version is explicitly recorded in the structured CVE data.