CVE-2026-109952
FreeRDP 3.0.0 before 3.32.0 Security Protocol Downgrade via Negotiation Response
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
The FreeRDP client 3.0.0 before 3.32.0 does not check a server-selected PROTOCOL_RDSTLS or PROTOCOL_HYBRID_EX against its enabled protocol set in nego_process_negotiation_response(), allowing a security protocol downgrade. A malicious server or man-in-the-middle can select RDSTLS to override /sec:nla pinning, complete authentication with an all-zero cookie, and receive the user's cleartext password in the Client Info PDU.
| CWE | CWE-757 |
| Vendor | freerdp |
| Product | freerdp |
| Published | Oct 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
FreeRDP / FreeRDP
3.0.0 < 3.32.0
References
Credits
🔍 DavidKorczynski