SB20260720227 - Out-of-bounds write in FreeRDP

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Main Vulnerability Database SB20260720227

SB20260720227 - Out-of-bounds write in FreeRDP

Published: July 20, 2026

Security Bulletin ID SB20260720227
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: N/A)

CWE-ID: CWE-787 - Out-of-bounds write

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


The vulnerability allows a remote attacker to cause a heap-based buffer overflow in a paste consumer process.

The vulnerability exists due to an out-of-bounds write in CliprdrStream_Read when processing a server-supplied CB_FILECONTENTS_RESPONSE for an IStream::Read request. A remote attacker can send a crafted clipboard file contents response with an oversized length field to cause a heap-based buffer overflow in a paste consumer process.

This issue affects the Windows client path and user interaction is required to paste server-offered clipboard file contents.


Remediation

Install update from vendor's website.

References