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CVE-2026-121663

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 probability1.00 %higher than 63% 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

Incomplete list of disallowed inputs 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 el texto describe un bypass de una función de seguridad sin detallar un impacto concreto para el atacante.

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:U/C:H/I:H/A:H
Weakness (CWE)
CWE-184

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-121663",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-121663",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-11-11T15:06:19.833697Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "secure@microsoft.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "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": "2026-11-10T19:20:29.777",
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-121663",
      "source": "secure@microsoft.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secure@microsoft.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-184"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Incomplete list of disallowed inputs in Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network."
    }
  ],
  "lastModified": "2026-11-11T15:17:16.517",
  "sourceIdentifier": "secure@microsoft.com"
}