# CVE-2026-80301: Avast sandbox sandbox escape via COM interface in Task Scheduler

Source: https://junglewise.ai/threats/cve-2026-80301-improper-isolation-in-the-avast-sandbox-on-windows-allows-a-local  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-80301 · Severity: info · Published 2026-11-06

Avast Antivirus contains a sandbox feature intended to isolate untrusted programs and prevent them from harming the system. A low-privileged attacker executing code inside this sandbox can exploit improper COM interface isolation to access Windows Task Scheduler, escape the sandbox, and execute arbitrary code with elevated privileges on the host system.

Technologies: [Avast Antivirus](https://junglewise.ai/threats/technologies/avast-antivirus-1). Vendors: [Avast](https://junglewise.ai/threats/vendors/avast).

## Quick answers

**Is CVE-2026-80301 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-80301 being exploited in the wild.

**How severe is CVE-2026-80301?** Informational severity, published 6 November 2026.

**Which products and versions are affected?** Avast Antivirus.

**Is there a fix for CVE-2026-80301?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-80301 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-80301?** Check whether you run Avast Antivirus. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability stems from improper isolation of COM interfaces within Avast's sandbox. While the sandbox virtualizes file system and registry access, it does not adequately restrict COM interface access to the Task Scheduler service. An attacker can instantiate COM objects bound to Task Scheduler and invoke methods to schedule and execute arbitrary tasks with host-level privileges, bypassing the sandbox's process and file isolation boundaries.

## Affected products

- Avast Antivirus

## Timeline

- 2026-11-06: disclosed

## References

- [https://support.avast.com/en-us/article/Update-Antivirus](https://support.avast.com/en-us/article/Update-Antivirus)
- [https://support.avg.com/SupportArticleView?l=en&urlname=Update-AVG-Antivirus](https://support.avg.com/SupportArticleView?l=en&urlname=Update-AVG-Antivirus)

## Related threats

- [Avast sandbox file virtualization escape on Windows](https://junglewise.ai/threats/cve-2026-80302-insufficient-isolation-in-the-avast-sandbox-file-virtualization)
- [Avast Antivirus denial of service in AvastSvc message dispatcher](https://junglewise.ai/threats/cve-2026-12067-missing-exception-handlers-in-avastsvc-native-message-dispatcher)
- [Double fetch in sandbox kernel driver in Avast/AVG Antivirus <25.3 on windows allows local attacker to escalate…](https://junglewise.ai/threats/cve-2025-13032-double-fetch-in-sandbox-kernel-driver-in-avast-avg-antivirus-25-3)