# CVE-2026-42907: Microsoft Windows Shell information disclosure

Source: https://junglewise.ai/threats/cve-2026-42907-microsoft-windows-shell-information-disclosure  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-09. Updated: 2026-06-09  
License: CC BY 4.0 with a link back

CVE-2026-42907 · Severity: medium · CVSS 6.5 · Published 2026-06-09

A security vulnerability in the Windows Shell component could allow an authorized user to access sensitive information they are not supposed to see. The Windows Shell is the graphical interface used to navigate the operating system and manage files. While an attacker must already have some level of access to the system, this flaw could lead to the exposure of private data, potentially compromising user privacy or corporate confidentiality.

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

## Quick answers

**Is CVE-2026-42907 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-42907 being exploited in the wild.

**How severe is CVE-2026-42907?** Medium severity, with a CVSS score of 6.5, published 9 June 2026.

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

**Is there a fix for CVE-2026-42907?** 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-2026-42907 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-42907?** 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

This vulnerability is classified as an Information Exposure (CWE-200) within the Microsoft Windows Shell component. An authenticated attacker with low privileges can exploit this flaw to disclose sensitive information locally. Although the CVSS vector indicates a network attack vector (AV:N), the vulnerability description specifies that the disclosure occurs locally. The root cause is a failure to properly restrict access to sensitive data within the Shell environment. Successful exploitation results in high confidentiality impact but does not affect system integrity or availability.

## Affected products

- Microsoft Windows Shell

## Timeline

- 2026-06-09: disclosed
- 2026-06-09: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42907](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42907)

## 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)
- [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)