CVE-2026-21518

highpriority · track · 1EPSS 0.015 · 73 %ileDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.46% (73rd) EPSS

CVSS 7.3 · high

Is it mine?

34 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMicrosoft Visual Studio Code CoPilot Chat Extensionmsrc_csaf
0.37.1:Security Update:https://github.com/microsoft/vscode/
https://github.com/microsoft/vscode/
FixedVisual Studio Codemsrc_csaf
1.110.1:Security Update:https://code.visualstudio.com/updates/v1_110
https://code.visualstudio.com/updates/v1_110

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–8.8

v3.17.3highAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 2.8 · impact 5.9

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:Csecondary · NCSC-NL NL

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-77USCWE-77USCWE-77USCWE-77US

affected products (34)

Products and version ranges known to be affected.

Microsoft .NET Framework 10.0all versionscert_bundDEcpe:/a:microsoft:.net_framework:10.0
Microsoft .NET Framework 8.0all versionscert_bundDEcpe:/a:microsoft:.net_framework:8.0
Microsoft .NET Framework 9.0all versionscert_bundDEcpe:/a:microsoft:.net_framework:9.0
Microsoft Visual Studio 2022 version 17.14all versionscert_bundDE
Microsoft Visual Studio 2022 version 18.3all versionscert_bundDE
Microsoft Visual Studio Codeall versionscert_bundDEcpe:/a:microsoft:visual_studio_code:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Microsoft Visual Studio 2022≤ version 17.14cert_bundDE
Microsoft Visual Studio 2022≤ version 18.3cert_bundDE
Microsoft Microsoft Visual Studio Code CoPilot Chat Extension0.27.0 → 0.37.1enisa_euvdEU
Microsoft Visual Studio Code1.0.0 → 1.110.1enisa_euvdEU
Microsoft Corp Visual Studio Code≤ 0.37.1fstec_bduRU
Microsoft Corp Visual Studio Code≤ 1.109.2fstec_bduRU
Microsoft Visual Studio Code CoPilot Chat Extensionall versionsfixedmsrc_csafUS
Microsoft Visual Studio Code CoPilot Chat Extension< 0.37.1msrc_csafUS
Visual Studio Codeall versionsfixedmsrc_csafUS
Visual Studio Code< 1.110.1msrc_csafUS
Microsoft .NET 10.0≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 10.0 installed on Linux≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 10.0 installed on Mac OS≤ vers:unknown/*ncsc_nlNL

showing 20 of 34

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0056Kwetsbaarheden verholpen in Microsoft Developer ToolsNL2026-02-10csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in diverse componenten van Visual Studio en .NET.
WID-SEC-W-2026-0367Microsoft DeveloperTools (Visual Studio Code und .NET): Mehrere SchwachstellenDeutsch2026-02-10csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft Visual Studio, Visual Studio Code und .NET ausnutzen, um sich erhöhte Rechte zu verschaffen, beliebigen Code auszuführen, Spoofing-Angriffe zu starten und die Authentifizierung zu umgehen.
msrc_CVE-2026-21518GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability2026-02-10csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf ncsc_nl NVD CVE.org MITRE

published 2026-02-10modified 2026-06-17

references (3)

External citations — patches, advisories, analysis.

scry

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