# CVE-2026-105506: Microsoft Windows Shell buffer over-read information disclosure

Source: https://junglewise.ai/threats/cve-2026-105506-buffer-over-read-in-windows-shell-allows-an-authorized-attacker  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-105506 · Severity: medium · CVSS 5 · Published 2026-11-10

Windows Shell, a core component of the Windows operating system that manages file browsing and user interface, contains a buffer over-read vulnerability. An authenticated attacker with local access could exploit this to read sensitive information from memory, such as passwords or data from other applications.

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

## Quick answers

**Is CVE-2026-105506 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105506 being exploited in the wild.

**How severe is CVE-2026-105506?** Medium severity, with a CVSS score of 5, published 10 November 2026.

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

**Is there a fix for CVE-2026-105506?** 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-2026-105506 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-105506?** 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 buffer over-read vulnerability exists in Windows Shell that allows an authenticated local attacker to read beyond allocated memory boundaries. The vulnerability requires local access and valid credentials; successful exploitation discloses sensitive information resident in process memory.

## Affected products

- Microsoft Windows Shell

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105506](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105506)

## Related threats

- [Windows Shell authentication algorithm spoofing](https://junglewise.ai/threats/cve-2026-83906-incorrect-implementation-of-authentication-algorithm-in-windows)
- [Windows Shell sensitive information disclosure](https://junglewise.ai/threats/cve-2026-83905-exposure-of-sensitive-system-information-to-an-unauthorized)
- [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)