Vulnerability-Lookup

GHSA-8R49-5PG7-MH6X

Vulnerability from github – Published: 2026-11-06 18:35 – Updated: 2026-11-10 21:31

Details

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

8.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80301"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-280"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-11-06T16:18:58Z",
    "severity": "HIGH"
  },
  "details": "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\u0027s intended process and file isolation boundaries and can be chained with other host-level privilege escalation techniques.",
  "id": "GHSA-8r49-5pg7-mh6x",
  "modified": "2026-11-10T21:31:53Z",
  "published": "2026-11-06T18:35:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80301"
    },
    {
      "type": "WEB",
      "url": "https://support.avast.com/en-us/article/Update-Antivirus"
    },
    {
      "type": "WEB",
      "url": "https://support.avg.com/SupportArticleView?l=en\u0026urlname=Update-AVG-Antivirus"
    },
    {
      "type": "WEB",
      "url": "https://support.norton.com/sp/en/us/home/current/solutions/v20240108175512167"
    },
    {
      "type": "WEB",
      "url": "https://www.gendigital.com/us/en/contact-us/security-advisories"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-80301 (GCVE-0-2026-80301)

Vulnerability from cvelistv5 – Published: 2026-11-06 16:01 – Updated: 2026-11-10 18:33

Title

Avast sandbox escape via unpreserved COM pathway through Task Scheduler

Summary

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

8.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-10 18:29 UTC

CWE

CWE-280 - Improper Handling of Insufficient Permissions or Privileges
CWE-653 - Improper Isolation or Compartmentalization

Assigner

GEN CNA under the mitre root

CNA scorecard B 75/100 over 24 records in the last 180 days details

References

4 references

URL	Tags
https://www.gendigital.com/us/en/contact-us/secur…	vendor-advisory
https://support.avast.com/en-us/article/Update-An…	patch
https://support.avg.com/SupportArticleView?l=en&u…	patch
https://support.norton.com/sp/en/us/home/current/…	patch

Impacted products

3 products

Vendor	Product	Version
Gen Digital	Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimate	Affected: 0 , < 26.7 (custom)
Gen Digital	AVG Antivirus Free, AVG Internet Security, AVG Ultimate	Affected: 0 , < 26.7 (custom)
Gen Digital	Norton Antivirus Plus, Norton 360 Standard, Norton 360 Deluxe, Norton 360 Advanced	Affected: 0 , < 26.7 (custom)

Credits

Teng Zheng Wang by VulnGuard Labs

Show details on NVD website

JSON

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              "confidentialityImpact": "HIGH",
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Sightings

Author	Source	Type	Date	Other

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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