Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-33689— xrdp: Pre-authentication out-of-bounds reads in channel parsers

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，该漏洞源于身份验证前的RDP消息解析逻辑存在越界读取，可能导致拒绝服务或泄露服务内存空间中的敏感信息。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.48% · P40
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-33689

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
xrdp: Pre-authentication out-of-bounds reads in channel parsers
Source: CVE Program / CVE List V5
Vulnerability Description
xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase. This vulnerability results from insufficient validation of input buffer lengths before processing dynamic channel communication. Successful exploitation can lead to a denial-of-service (DoS) condition via a process crash or potential disclosure of sensitive information from the service's memory space. 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:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
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，该漏洞源于身份验证前的RDP消息解析逻辑存在越界读取，可能导致拒绝服务或泄露服务内存空间中的敏感信息。
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-2026-33689

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-33689

请登录查看更多情报信息。

Vendor Pages for CVE-2026-33689 (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-2026-32623 xrdp: Heap buffer overflow in NeutrinoRDP channel reassembly
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-125

V. Comments for CVE-2026-33689

No comments yet

Leave a comment