CVE-2026-109952CWE-757

CVE-2026-109952

Medium · published October 13, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
17.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
6.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00268 · 17.9th percentile
Weakness
CWE-757 · Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
Published
2026-10-13T18:17Z
Affected products (1)
ProductVersionsFixed in
freerdp/freerdp≥ 3.0.0, < 3.32.03.32.0
References (3)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65 · [email protected]https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-security-protocol-downgrade-via-negotiation-response · [email protected]https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qq23-mqmv-pc65 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 15 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 13 OCT 13:27Z
    FreeRDP 3.0.0 before 3.32.0 Security Protocol Downgrade via Negotiation Response
    cvelistv5
  • 13 OCT 13:27Z
    FreeRDP 3.0.0 before 3.32.0 Security Protocol Downgrade via Negotiation Response
    cvelistv5