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CVE-2026-17252— Unauthenticated Denial of Service via Composed HTTP Parsing and Stack-Based Out-of-Bounds Write Vulnerability in TL-MR6400 Web Management Interface

Quick assessment

Affected

TP-Link Systems Inc. TL-MR6400 v7.0

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.

TP-Link TL-MR6400是中国TP-Link公司开源的一款4G无线路由器。 TP-Link TL-MR6400 v7.0 1.9.0 Build 260714之前版本存在缓冲区错误漏洞，该漏洞源于登录请求处理功能存在基于堆栈的越界写入，未经身份验证的相邻攻击者发送特制的畸形HTTP请求即可触发，导致Web服务进程崩溃，造成拒绝服务。

CVSS 7.1 · High EPSS 0.27% · P19 Updated Sep 04, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
TP-Link Systems Inc.	TL-MR6400 v7.0	`< 1.9.0 Build 260714`	affected

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I. Basic Information for CVE-2026-17252

Vulnerability Information

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Vulnerability Title

Unauthenticated Denial of Service via Composed HTTP Parsing and Stack-Based Out-of-Bounds Write Vulnerability in TL-MR6400 Web Management Interface

Source: CVE Program / CVE List V5

Vulnerability Description

A stack-based out-of-bounds write vulnerability exists in the login request handling functionality of the administrative web interface of TP-Link TL-MR6400 v7 routers. An unauthenticated adjacent attacker can trigger the vulnerability by sending a specially crafted malformed HTTP request. Successful exploitation may cause the web service process to crash, resulting in a denial-of-service condition and temporary loss of access to the router's web management interface.

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:H/SC:N/SI:N/SA:N

Source: CVE Program / CVE List V5

Vulnerability Type

跨界内存写

Source: CVE Program / CVE List V5

Vulnerability Title

TP-Link TL-MR6400 缓冲区错误漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

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
TP-Link Systems Inc.	TL-MR6400 v7.0	0 ~ 1.9.0 Build 260714	-

II. Public POCs for CVE-2026-17252

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-17252

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Vendor Advisories for CVE-2026-17252 (1)

🔗 Security Advisory: Multiple Vulnerabilities in TL-MR6400 (CVE-2026-17250, CVE-2026-17251 & CVE-2026-17252) | TP-Link vendor-advisory

Vendor Pages for CVE-2026-17252 (1)

🔗 Download for TL-MR6400 | TP-Link Read full article patch

https://www.cve.org/CVERecord?id=CVE-2026-17252

Same Patch Batch · TP-Link Systems Inc. · 2026-08-21 · 3 CVEs total

CVE-2026-17250	8.5 HIGH	Authenticated Remote Code Execution via Stack-Based Buffer Overflow in Firmware Update Han
CVE-2026-17251	7.1 HIGH	Unauthenticated Denial of Service via Null Pointer Dereference in HTTP Request Parsing

IV. Related Vulnerabilities

Same product: TL-MR6400 v7.0

Same vendor: TP-Link Systems Inc.

Same weakness: CWE-787