CVE-2026-76649— Pre-Authentication NULL Pointer Dereference in UPnP SOAP Action Request Processing in TP-Link TL-WR841N
Quick assessment
Affected
TP-Link System Inc. TL-WR841N v14
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.
TL-WR841N 路由器 v14 版本的 UPnP 服务在处理 SOAP 动作请求时存在空指针引用漏洞。经过特制的、包含异常 XML 内容的 SOAP 动作请求可能导致 UPnP 守护进程意外终止。 成功利用该漏洞可能导致服务拒绝（Denial-of-Service），影响 UPnP 功能，直到服务被重启或设备被重新启动。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-76649
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Pre-Authentication NULL Pointer Dereference in UPnP SOAP Action Request Processing in TP-Link TL-WR841N
Source: CVE Program / CVE List V5
Vulnerability Description
A NULL
pointer dereference vulnerability exists in TL-WR841N v14 in the UPnP service when processing SOAP action requests. A specially crafted SOAP action request containing unexpected XML content may cause the UPnP daemon to terminate unexpectedly.
Successful exploitation may result in a denial-of-service condition affecting UPnP functionality until the service is restarted or the device is rebooted.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| TP-Link System Inc. | TL-WR841N v14 | 0 ~ TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478 | - |
|
II. Public POCs for CVE-2026-76649
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-76649
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-76649 (1)
Vendor Pages for CVE-2026-76649 (2)
Same Patch Batch · TP-Link System Inc. · 2026-08-28 · 3 CVEs total
| CVE-2026-76651 | 5.3 MEDIUM | Pre-Authentication Multipart Boundary Buffer Overflow in HTTP Service in TP-Link TL-WR841N |
| CVE-2026-76650 | 5.3 MEDIUM | Pre-Authentication NULL Pointer Dereference in UPnP SOAP State Variable Query Processing i |
IV. Related Vulnerabilities
Same product: TL-WR841N v14
-
CVE-2026-76651
Pre-Authentication Multipart Boundary Buffer Overflow in HTT -
CVE-2026-76650
Pre-Authentication NULL Pointer Dereference in UPnP SOAP Sta -
CVE-2026-9105
Authenticated Stack-Based Buffer Overflow in TP-Link TL-WR84 -
CVE-2026-3622
Denial-of-Service Vulnerability in UPnP Component of TP Link -
CVE-2025-9014
Null Pointer Dereference Vulnerability on TL-WR841N
Same vendor: TP-Link System Inc.
-
CVE-2026-76651
Pre-Authentication Multipart Boundary Buffer Overflow in HTT -
CVE-2026-76650
Pre-Authentication NULL Pointer Dereference in UPnP SOAP Sta -
CVE-2026-22223
Command Injection Vulnerability on TP-Link Archer BE230 v1.2 -
CVE-2025-11676
UPnP DOS in TL-WR940N V6 -
CVE-2025-6983
Clickjacking vulnerability on the management web application
Same weakness: CWE-476
-
CVE-2026-76650
Pre-Authentication NULL Pointer Dereference in UPnP SOAP Sta -
CVE-2026-81490
MongoDB Connector for BI Improper Error Handling During Sche -
CVE-2026-75125
PLANET GS-4210-16P2S Null Pointer Dereference DoS via dispat -
CVE-2026-54084
Wazuh agent enrollment NULL pointer dereference via malforme -
CVE-2026-48429
Substance3D - Designer | NULL Pointer Dereference (CWE-476)
V. Comments for CVE-2026-76649
No comments yet