CVE-2026-66326 (GCVE-0-2026-66326)

Vulnerability from cvelistv5 – Published: 2026-08-03 22:58 – Updated: 2026-08-03 22:59
VLAI
Title
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Summary
Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft Edge (Chromium-based) Affected: 1.0.0.0 , < 151.0.4129.59 (custom)
Create a notification for this product.
Date Public
2026-07-31 14:00
Show details on NVD website
To clipboard 

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            }
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          "nodes": [
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                  "vulnerable": true
                }
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              "negate": false,
              "operator": "OR"
            }
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      ],
      "datePublic": "2026-07-31T14:00:00.000Z",
      "descriptions": [
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        }
      ],
      "metrics": [
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C",
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          "scenarios": [
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              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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              "description": "CWE-862: Missing Authorization",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-03T22:59:11.516Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
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            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66326"
        }
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      "title": "Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability"
    }
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    "assignerShortName": "microsoft",
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    "datePublished": "2026-08-03T22:58:02.203Z",
    "dateReserved": "2026-07-24T18:06:51.296Z",
    "dateUpdated": "2026-08-03T22:59:11.516Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-66326\",\"sourceIdentifier\":\"secure@microsoft.com\",\"published\":\"2026-08-04T00:17:39.847\",\"lastModified\":\"2026-08-04T00:17:39.847\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.\"}],\"affected\":[{\"source\":\"secure@microsoft.com\",\"affectedData\":[{\"vendor\":\"Microsoft\",\"product\":\"Microsoft Edge (Chromium-based)\",\"versions\":[{\"version\":\"1.0.0.0\",\"lessThan\":\"151.0.4129.59\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-862\"}]}],\"references\":[{\"url\":\"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66326\",\"source\":\"secure@microsoft.com\"}]}}"
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.