CVE-2026-109952

Published: Ott 13, 2026 Last Modified: Ott 13, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,0
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: passive
Confidentiality: N/A
Integrity: N/A
Availability: N/A
MEDIUM 5,3
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: required
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none

Description

AI Translation Available

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.

757

Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism
Applicable Platforms
All platforms may be affected
View CWE Details
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA…
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65
https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3…
https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-security-proto…