# CVE-2026-83519: Microsoft Windows Error Reporting heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-83519-heap-based-buffer-overflow-in-windows-error-reporting-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-83519 · Severity: critical · CVSS 9.8 · Published 2026-10-13

Windows Error Reporting, a system component that collects and reports application failures, contains a heap buffer overflow vulnerability that allows an attacker to execute arbitrary code remotely. An attacker on the network can exploit this vulnerability without authentication to gain complete control over affected Windows systems.

Technologies: [Microsoft Windows Error Reporting](https://junglewise.ai/threats/technologies/windows-error-reporting). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-83519 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83519 being exploited in the wild.

**How severe is CVE-2026-83519?** Critical severity, with a CVSS score of 9.8, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows Error Reporting.

**Is there a fix for CVE-2026-83519?** 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-2026-83519 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-83519?** Check whether you run Microsoft Windows Error Reporting. 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

A heap-based buffer overflow in Windows Error Reporting allows remote code execution via network attack without requiring user interaction or authentication. The vulnerability resides in the error reporting component and can be triggered by a specially crafted network request, leading to memory corruption and arbitrary code execution.

## Affected products

- Microsoft Windows Error Reporting

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83519](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83519)

## Related threats

- [Windows Error Reporting privilege escalation in file handling](https://junglewise.ai/threats/cve-2026-94525-an-elevation-of-privilege-vulnerability-exists-in-windows-error)
- [Windows Error Reporting double free privilege escalation](https://junglewise.ai/threats/cve-2026-85862-double-free-in-windows-error-reporting-allows-an-authorized)
- [Windows Error Reporting use-after-free privilege escalation](https://junglewise.ai/threats/cve-2026-85354-use-after-free-in-windows-error-reporting-allows-an-authorized)
- [Windows Error Reporting weak authentication privilege escalation](https://junglewise.ai/threats/cve-2026-83840-weak-authentication-in-windows-error-reporting-allows-an)
- [Microsoft Windows Error Reporting out-of-bounds read](https://junglewise.ai/threats/cve-2026-83747-out-of-bounds-read-in-windows-error-reporting-allows-an)