CVE-2026-110838

HIGH 7.5

FreeRDP shadow before 3.32.0 Pre-Authentication Input Injection via Confirm Active bypass

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	freerdp
Product	freerdp
Published	Oct 14, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Affected Versions

FreeRDP / FreeRDP

3.0.0 < 3.32.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Kushalkhemka mayank-jangid-moon skigeek16 opensec-intelligence