SB2026071552 - Multiple vulnerabilities in Microsoft Windows Remote Desktop Protocol (RDP)

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Main Vulnerability Database SB2026071552

SB2026071552 - Multiple vulnerabilities in Microsoft Windows Remote Desktop Protocol (RDP)

Published: July 15, 2026

Security Bulletin ID SB2026071552
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 vulnerabilities.


1) Use of uninitialized resource (CVE-ID: CVE-2026-55003)

CWE-ID: CWE-908 - Use of Uninitialized Resource

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


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

The vulnerability exists due to usage of uninitialized resources in Windows Remote Desktop Protocol (RDP). A remote attacker can trigger uninitialized usage of resources and gain access to sensitive information on the system.


2) Out-of-bounds read (CVE-ID: CVE-2026-54126)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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 a boundary condition in Windows Remote Desktop Protocol (RDP). A remote attacker can trigger an out-of-bounds read error and read contents of memory on the system.


3) Off-by-one (CVE-ID: CVE-2026-50497)

CWE-ID: CWE-193 - Off-by-one Error

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


The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to an off-by-one error in Windows Remote Desktop Protocol (RDP). A remote attacker can trigger an off-by-one error and gain access to sensitive information on the target system.


4) Out-of-bounds read (CVE-ID: CVE-2026-50445)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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 a boundary condition in Windows Remote Desktop Protocol (RDP). A remote attacker can trigger an out-of-bounds read error and read contents of memory on the system.


5) Out-of-bounds read (CVE-ID: CVE-2026-57979)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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 a boundary condition in Windows Remote Desktop Protocol (RDP). A remote attacker can trigger an out-of-bounds read error and read contents of memory on the system.


Remediation

Install update from vendor's website.

References