CVE-2026-109246

Medium

Description

FreeRDP before 3.32.0 contains a divide-by-zero vulnerability in the freerdp-shadow-cli shadow server: the frame id in a client's Frame Acknowledge PDU is stored without a range check, so the in-flight frame count in shadow_encoder_inflight_frames() can underflow. An authenticated client can acknowledge a frame id one greater than the last frame sent, causing shadow_encoder_create_frame_id() to divide by zero (SIGFPE) and terminate the process, disconnecting all viewers.

SeverityMedium

CVSS6.5

Exploit probability—

ProductFreerdp

PublishedOct 12, 2026

First seenOct 12, 2026

Weakness typeCWE-191CWE-191

How to fix

Update

freerdp freerdp3.32.0 or later

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6vjv-4hm3-6698

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	v < 3.32.0	3.32.0

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