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CVE-2026-73241— FreeRDP: RDSTLS server authentication bypass: a credential-less Capabilities PDU is accepted at the auth step (fail-open `resultCode`)

Quick assessment

Affected
FreeRDP FreeRDP
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeRDP是FreeRDP组织开源的一款远程桌面协议(RDP)的实现。 FreeRDP 3.30.0之前版本存在授权问题漏洞，该漏洞源于libfreerdp/core/rdstls.c中的服务器端RDSTLS在等待RDSTLS_TYPE_AUTHREQ时接受攻击者提供的RDSTLS_TYPE_CAPABILITIES PDU，使resultCode保持为RDSTLS_RESULT_SUCCESS，导致远程未认证客户端绕过RedirectionGuid、用户名、域名或密码检查。

CVSS 8.3 · High EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
FreeRDP FreeRDP < 3.30.0 affected
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I. Basic Information for CVE-2026-73241

Vulnerability Information
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Vulnerability Title
FreeRDP: RDSTLS server authentication bypass: a credential-less Capabilities PDU is accepted at the auth step (fail-open `resultCode`)
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.30.0, FreeRDP server-side RDSTLS in libfreerdp/core/rdstls.c accepts an attacker-supplied RDSTLS_TYPE_CAPABILITIES PDU while rdstls_server_authenticate is waiting for RDSTLS_TYPE_AUTHREQ, leaving resultCode at RDSTLS_RESULT_SUCCESS and allowing a remote unauthenticated client to bypass the RedirectionGuid, username, domain, or password checks. This issue is fixed in version 3.30.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeRDP是FreeRDP组织开源的一款远程桌面协议(RDP)的实现。 FreeRDP 3.30.0之前版本存在授权问题漏洞，该漏洞源于libfreerdp/core/rdstls.c中的服务器端RDSTLS在等待RDSTLS_TYPE_AUTHREQ时接受攻击者提供的RDSTLS_TYPE_CAPABILITIES PDU，使resultCode保持为RDSTLS_RESULT_SUCCESS，导致远程未认证客户端绕过RedirectionGuid、用户名、域名或密码检查。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRDP FreeRDP < 3.30.0 -

II. Public POCs for CVE-2026-73241

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11494 chars
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III. Intelligence Information for CVE-2026-73241

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Patches & Fixes for CVE-2026-73241 (1)

Vendor Advisories for CVE-2026-73241 (1)

Vendor Pages for CVE-2026-73241 (1)

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-287

V. Comments for CVE-2026-73241

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