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CVE-2026-32623— xrdp: Heap buffer overflow in NeutrinoRDP channel reassembly

Quick assessment

Affected
neutrinolabs xrdp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

xrdp是neutrinolabs开源的一款开源远程桌面协议服务器。 xrdp 0.10.5及之前版本存在安全漏洞，该漏洞源于NeutrinoRDP模块中存在基于堆的缓冲区溢出，可能导致内存损坏、拒绝服务或远程代码执行。

AI Predicted 8.1 Difficulty: Hard EPSS 0.78% · P54
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I. Basic Information for CVE-2026-32623

Vulnerability Information
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Vulnerability Title
xrdp: Heap buffer overflow in NeutrinoRDP channel reassembly
Source: CVE Program / CVE List V5
Vulnerability Description
xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in the NeutrinoRDP module. When proxying RDP sessions from xrdp to another server, the module fails to properly validate the size of reassembled fragmented virtual channel data against its allocated memory buffer. A malicious downstream RDP server (or an attacker capable of performing a Man-in-the-Middle attack) could exploit this flaw to cause memory corruption, potentially leading to a Denial of Service (DoS) or Remote Code Execution (RCE). The NeutrinoRDP module is not built by default. This vulnerability only affects environments where the module has been explicitly compiled and enabled. Users can verify if the module is built by checking for --enable-neutrinordp in the output of the xrdp -v command. This issue has been fixed in version 0.10.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
xrdp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
xrdp是neutrinolabs开源的一款开源远程桌面协议服务器。 xrdp 0.10.5及之前版本存在安全漏洞，该漏洞源于NeutrinoRDP模块中存在基于堆的缓冲区溢出，可能导致内存损坏、拒绝服务或远程代码执行。
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
neutrinolabs xrdp < 0.10.6 -

II. Public POCs for CVE-2026-32623

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III. Intelligence Information for CVE-2026-32623

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Vendor Pages for CVE-2026-32623 (1)

Same Patch Batch · neutrinolabs · 2026-04-17 · 8 CVEs total

CVE-2026-32107 8.8 HIGH xrdp: Fail-open privilege drop in sesexec — child processes may execute as root if setuid
CVE-2026-33145 6.3 MEDIUM xrdp: Authenticated RCE via unsanitized AlternateShell execution in xrdp-sesman
CVE-2026-35512 xrdp: Heap buffer overflow in EGFX channel
CVE-2026-32105 xrdp: RDP MAC signature (dataSignature) never verified on receive — integrity bypass in no
CVE-2026-32624 xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() via incorrect g_strncat length
CVE-2026-33689 xrdp: Pre-authentication out-of-bounds reads in channel parsers
CVE-2026-33516 xrdp: Pre-authentication out-of-bounds reads in RDP capability and channel parsers

IV. Related Vulnerabilities

Same product: xrdp
Same vendor: neutrinolabs
Same weakness: CWE-122

V. Comments for CVE-2026-32623

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