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CVE-2026-9031— Authenticated Denial-of-Service in HTTPD Service in TP-Link Archer A6

Quick assessment

Affected
TP-Link Systems Inc. Archer A6 v4
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.

WordPress Formidable Forms是WordPress基金会开源的一款表单创建插件。 TP-Link Archer A6 v4 V4_1.15.10 Build 260625 Rel.25447之前版本存在输入验证错误漏洞，该漏洞源于HTTP-WRITEOEM handler对用户提供的数据验证不足，可能导致httpd进程或设备崩溃，造成Web界面无法访问和拒绝服务。

CVSS 6.8 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
TP-Link Systems Inc. Archer A6 v4 < V4_1.15.10 Build 260625 Rel.25447 affected
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I. Basic Information for CVE-2026-9031

Vulnerability Information
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Vulnerability Title
Authenticated Denial-of-Service in HTTPD Service in TP-Link Archer A6
Source: CVE Program / CVE List V5
Vulnerability Description
An input validation vulnerability exists in the HTTP-WRITEOEM handler due to insufficient validation of user-supplied data before it is processed by internal flash-write handling logic. Successful exploitation may cause httpd process or device to crash, resulting in loss of access to the web interface and a denial-of-service condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link Archer A6 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Formidable Forms是WordPress基金会开源的一款表单创建插件。 TP-Link Archer A6 v4 V4_1.15.10 Build 260625 Rel.25447之前版本存在输入验证错误漏洞，该漏洞源于HTTP-WRITEOEM handler对用户提供的数据验证不足，可能导致httpd进程或设备崩溃，造成Web界面无法访问和拒绝服务。
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. Archer A6 v4 0 ~ V4_1.15.10 Build 260625 Rel.25447 -

II. Public POCs for CVE-2026-9031

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III. Intelligence Information for CVE-2026-9031

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Vendor Advisories for CVE-2026-9031 (1)

Vendor Pages for CVE-2026-9031 (1)

IV. Related Vulnerabilities

Same product: Archer A6 v4
Same vendor: TP-Link Systems Inc.
Same weakness: CWE-20

V. Comments for CVE-2026-9031

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