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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-38821

Quick assessment

Affected
openNDS openNDS
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.

在 11.0.0 之前的 openNDS 中存在一个基于堆的缓冲区溢出漏洞，该漏洞允许位于 Captive Portal（强制门户）网络上的未认证攻击者使 openNDS 守护进程崩溃（拒绝服务攻击），并有可能实现远程代码执行。该漏洞位于 文件中。

CVSS 7.1 · High EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
openNDS openNDS < 11.0.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-38821

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A heap-based buffer overflow vulnerability exists in openNDS before 11.0.0 that allows an unauthenticated attacker on the captive portal network to crash the openNDS daemon (denial of service) and potentially achieve remote code execution. This is in http_microhttpd.c.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
openNDS openNDS 0 ~ 11.0.0 -

II. Public POCs for CVE-2026-38821

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-38821

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-38821 (1)

Same Patch Batch · openNDS · 2026-08-28 · 4 CVEs total

CVE-2026-38820 8.3 HIGH openNDS 11.0.0前存在Shell命令注入
CVE-2026-38822 7.6 HIGH openNDS 11.0.0 前客户端脚本命令注入
CVE-2026-38819 5.3 MEDIUM openNDS 11.0.0之前存在内存泄漏漏洞

IV. Related Vulnerabilities

Same product: openNDS
Same vendor: openNDS
Same weakness: CWE-122

V. Comments for CVE-2026-38821

No comments yet

Leave a comment