CVE-2026-109952

5.3 MEDIUMpublic exploit available

Published 2026-10-13 · Updated 2026-10-16

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD description

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.

CVSS vector

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

Weaknesses

CWE-757

Public exploit & PoC references

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65

All references

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65
https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-security-protocol-downgrade-via-negotiation-response
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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