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CVE-2025-21264

Status: AnalyzedHigh (7.1)—

Files or directories accessible to external parties in Visual Studio Code allows an unauthorized attacker to bypass a security feature locally.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

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

AV:L + UI:R indica explotación en el cliente (T1203). CWE-552 (acceso a archivos/directorios) y 'bypass de seguridad' sugieren lectura de datos sensibles (T1005, T1552) por acceso local descontrolado.

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

Update SoftwareActive Directory ConfigurationUser TrainingRestrict File and Directory PermissionsPrivileged Account ManagementPassword Policies

Affected technologies (1)

Microsoft — Visual Studio Code

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2025-21264",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-21264",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-05-13T18:18:44.359305Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
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          "version": "3.1",
          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4.7,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio Code CoPilot Chat Extension",
          "versions": [
            {
              "status": "affected",
              "version": "0.27.0",
              "lessThan": "0.27.2",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Visual Studio Code",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0",
              "lessThan": "1.100.1",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-05-13T17:15:51.170",
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21264",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secure@microsoft.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-552"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Files or directories accessible to external parties in Visual Studio Code allows an unauthorized attacker to bypass a security feature locally."
    },
    {
      "lang": "es",
      "value": "Los archivos o directorios a los que pueden acceder terceros en Visual Studio Code permiten que un atacante no autorizado eluda una característica de seguridad localmente."
    }
  ],
  "lastModified": "2026-06-17T08:42:56.170",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:visual_studio_code:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "33F40196-C733-4997-B275-0890C10B5F21",
              "versionEndExcluding": "1.100.1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}