# CVE-2026-83905: Windows Shell sensitive information disclosure

Source: https://junglewise.ai/threats/cve-2026-83905-exposure-of-sensitive-system-information-to-an-unauthorized  
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-2026-83905 · Severity: medium · CVSS 4.7 · Published 2026-10-13

Windows Shell, a core component of the Windows operating system, has a vulnerability that allows an authorized local user to access sensitive system information they should not have permission to view. An attacker with local access could gather confidential data about the system for further exploitation or reconnaissance purposes.

Technologies: [Microsoft Windows Shell](https://junglewise.ai/threats/technologies/windows-shell). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-83905 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83905 being exploited in the wild.

**How severe is CVE-2026-83905?** Medium severity, with a CVSS score of 4.7, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows Shell.

**Is there a fix for CVE-2026-83905?** 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-2026-83905 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-83905?** Check whether you run Microsoft Windows Shell. 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 privilege boundary bypass in Windows Shell allows an authorized local user to read sensitive system information outside their normal access scope. The vulnerability requires local access and elevated privileges, limiting exposure to users or processes already on the system. This is an information disclosure issue that does not enable code execution or system modification.

## Affected products

- Microsoft Windows Shell

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83905](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83905)

## Related threats

- [Microsoft Windows Shell buffer over-read information disclosure](https://junglewise.ai/threats/cve-2026-105506-buffer-over-read-in-windows-shell-allows-an-authorized-attacker)
- [Windows Shell authentication algorithm spoofing](https://junglewise.ai/threats/cve-2026-83906-incorrect-implementation-of-authentication-algorithm-in-windows)
- [Microsoft Windows Shell missing authentication privilege escalation](https://junglewise.ai/threats/cve-2026-69528-microsoft-windows-shell-missing-authentication-privilege)
- [Microsoft Windows Shell use-after-free privilege escalation](https://junglewise.ai/threats/cve-2026-69392-use-after-free-in-windows-shell-allows-an-authorized-attacker-to)
- [Microsoft Windows Shell information disclosure](https://junglewise.ai/threats/cve-2026-42907-microsoft-windows-shell-information-disclosure)