CVE-2026-110838

8.7 highEPSS 0.3%

FreeRDP shadow server from 3.0.0 before 3.32.0 dispatches input PDUs during the Confirm Active state before authentication, allowing unauthenticated attackers to inject keyboard input. Attackers can negotiate TLS-only RDP and send an input PDU without Confirm Active to inject synthetic keystrokes into the host user's X11 session via XTEST.

CVSS 4.0: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-25)
CWE: CWE-306
Published: 2026-10-14
Modified: 2026-10-23
Record from: the NVD, synced 2026-10-24

Affected

freerdp:freerdp

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m998-cvfm-9444
https://www.vulncheck.com/advisories/freerdp-shadow-before-3.32.0-pre-authentication-input-injection-via-confirm-active-bypass

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