SB20260414168 - Multiple vulnerabilities in Microsoft Windows Shell

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Main Vulnerability Database SB20260414168

SB20260414168 - Multiple vulnerabilities in Microsoft Windows Shell

Published: April 14, 2026 Updated: April 28, 2026

Security Bulletin ID SB20260414168
CSH Severity
High
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 17% Medium 33% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2026-26165)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Windows Shell. A local user can win a race condition and gain elevated privileges on the target system.


2) Protection Mechanism Failure (CVE-ID: CVE-2026-32225)

CWE-ID: CWE-693 - Protection Mechanism Failure

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient implementation of security measures in Windows Shell. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code on the system.


3) Information disclosure (CVE-ID: CVE-2026-32151)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in Windows Shell. A remote user can gain unauthorized access to sensitive information on the system.


4) Protection Mechanism Failure (CVE-ID: CVE-2026-32202)

CWE-ID: CWE-693 - Protection Mechanism Failure

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Green


The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient implementation of security measures in Windows Shell. A remote attacker can bypass implemented security restrictions and view some sensitive information.


5) Race condition (CVE-ID: CVE-2026-27918)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition in Windows Shell. A local user can exploit the race and escalate privileges on the system.


6) Double free (CVE-ID: CVE-2026-26166)

CWE-ID: CWE-415 - Double Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to a boundary error in Windows Shell. A local user can win a race condition and gain elevated privileges on the system.


Remediation

Install update from vendor's website.

References