CVE-2021-41159
freerdp: improper client input validation for gateway connections allows to overwrite memory
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 21, 2021
Updated · November 22, 2025
Description
A flaw was found in the FreeRDP client when it fails to validate input data when using gateway connections. This flaw could allow a malicious gateway to send a specially crafted input to a client leading to an out of bounds write in client memory. The highest threat from this flaw is that it could allow arbitrary code to be executed on the target system.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-787 · Out-of-bounds Write