Out-of-bounds read in FreeRDP - CVE-2026-57157
Published: July 6, 2026
Vulnerability identifier: #VU136926
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-57157
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeRDP
Affected software:
FreeRDP
FreeRDP
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in the RDCamera_Device_Enumerator dynamic virtual channel handlers when parsing attacker-supplied DeviceName or VirtualChannelName fields without a NUL terminator. A remote attacker can send a specially crafted channel notification to cause a denial of service.
Direct information disclosure is limited because the out-of-bounds value is only used in a comparison, and the past-allocation read requires a message that exactly fills the 4096-byte receive buffer.
How to mitigate CVE-2026-57157
Install security update from vendor's website.