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CVE-2026-121665

High (8.8)—
Schedule the patchSeverity High 8.8. No public exploit or active exploitation known.
Vendor advisory· Microsoft MSRC
Severity8.8High · CVSS 3.1
Exploitation probability0.44 %higher than 38% of CVEs · score from Nov 11, 2026
Active exploitationNonot in the CISA catalog · checked Nov 12, 03:00 AM
Public exploitNot knownno public code found

News and reports on Orbitaley

Trust boundary violation in Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.

Timeline

Built from our own data: NVD, CISA KEV and other exploitation catalogues, FIRST EPSS, public exploits, specialised media and Orbitaley coverage.

  1. CVE record published in NVD
  2. Alert: Microsoft fixes 200 vulnerabilities, including an Outlook flaw CISA confirms is being exploited

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

El vector CVSS indica UI:R (requiere interacción del usuario) y AV:N/PR:N; el texto solo describe una elusión de funcionalidad de seguridad (CWE-501) sin especificar qué obtiene el atacante después.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Application Isolation and SandboxingExploit ProtectionUpdate Software

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Microsoft — Visual Studio CodeAI

NVD record

NVD status
Awaiting Analysis
Published
Nov 10, 2026
Last modified
Nov 11, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L
Weakness (CWE)
CWE-501

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-121665",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-121665",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-11-11T15:06:53.300107Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "secure@microsoft.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 5.3,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Visual Studio Code",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0",
              "lessThan": "1.145.3",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-11-10T19:20:30.100",
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-121665",
      "source": "secure@microsoft.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secure@microsoft.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-501"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Trust boundary violation in Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network."
    }
  ],
  "lastModified": "2026-11-11T15:17:16.667",
  "sourceIdentifier": "secure@microsoft.com"
}