CVE-2026-80301

Full vulnerability record from the local CVENow database.

Description

Improper isolation in the Avast sandbox on Windows allows a local, low-privileged attacker executing inside the sandbox to access COM interfaces to the Task Scheduler service, escape containment, and execute code with elevated privileges outside the sandbox. The sandbox virtualizes file system and registry access but does not adequately restrict COM interface access to Task Scheduler. A process inside the sandbox can instantiate COM objects bound to Task Scheduler functionality and invoke methods to schedule and execute tasks on the host system. The Task Scheduler COM pathway is not blocked by the sandbox policy, allowing arbitrary code execution in the host security context. This escape vector bypasses the sandbox's intended process and file isolation boundaries and can be chained with other host-level privilege escalation techniques.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-11-06 16:18:58.870000

Last modified

2026-11-06 16:18:58.870000

View original CVE JSON

{
  "id": "CVE-2026-80301",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-06T16:18:58.870",
  "lastModified": "2026-11-06T16:18:58.870",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper isolation in the Avast sandbox on Windows allows a local, low-privileged attacker executing inside the sandbox to access COM interfaces to the Task Scheduler service, escape containment, and execute code with elevated privileges outside the sandbox.\n\n\n\nThe sandbox virtualizes file system and registry access but does not adequately restrict COM interface access to Task Scheduler. A process inside the sandbox can instantiate COM objects bound to Task Scheduler functionality and invoke methods to schedule and execute tasks on the host system. The Task Scheduler COM pathway is not blocked by the sandbox policy, allowing arbitrary code execution in the host security context.\n\n\n\nThis escape vector bypasses the sandbox's intended process and file isolation boundaries and can be chained with other host-level privilege escalation techniques."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Gen Digital",
          "product": "Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimate",
          "defaultStatus": "affected",
          "platforms": [
            "Windows"
          ],
          "versions": [
            {
              "version": "0",
              "lessThan": "26.7",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Gen Digital",
          "product": "AVG Antivirus Free, AVG Internet Security, AVG Ultimate",
          "defaultStatus": "affected",
          "platforms": [
            "Windows"
          ],
          "versions": [
            {
              "version": "0",
              "lessThan": "26.7",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Gen Digital",
          "product": "Norton Antivirus Plus, Norton 360 Standard, Norton 360 Deluxe, Norton 360 Advanced",
          "defaultStatus": "affected",
          "platforms": [
            "Windows"
          ],
          "versions": [
            {
              "version": "0",
              "lessThan": "26.7",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-280"
        },
        {
          "lang": "en",
          "value": "CWE-653"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://support.avast.com/en-us/article/Update-Antivirus",
      "source": "[email protected]"
    },
    {
      "url": "https://support.avg.com/SupportArticleView?l=en&urlname=Update-AVG-Antivirus",
      "source": "[email protected]"
    },
    {
      "url": "https://support.norton.com/sp/en/us/home/current/solutions/v20240108175512167",
      "source": "[email protected]"
    },
    {
      "url": "https://www.gendigital.com/us/en/contact-us/security-advisories/",
      "source": "[email protected]"
    }
  ]
}