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CVE-2026-9030— 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之前版本存在竞争条件问题漏洞，该漏洞源于异步systool指令处理路径未正确同步或安全管理并发systool操作，可能导致拒绝服务，造成Web管理界面暂时无法访问或设备重启。

CVSS 6.8 · Medium EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

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-2026-9030

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
A denial-of-service vulnerability exists in httpd service on Archer A6 v4 where the asynchronous systool instruction handlng path in httpd does not properly synchronize or safely manage concurrent systool operations.  By sending crafted systool instructions through the asynchronous request path, successful exploitation may cause the httpd process or device management service to crash and may result in temporary loss of access to the web management interface or device reboot.
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
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link Archer A6 竞争条件问题漏洞
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之前版本存在竞争条件问题漏洞，该漏洞源于异步systool指令处理路径未正确同步或安全管理并发systool操作，可能导致拒绝服务，造成Web管理界面暂时无法访问或设备重启。
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-2026-9030

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III. Intelligence Information for CVE-2026-9030

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Vendor Advisories for CVE-2026-9030 (1)

Vendor Pages for CVE-2026-9030 (1)

IV. Related Vulnerabilities

Same product: Archer A6 v4
Same vendor: TP-Link Systems Inc.
Same weakness: CWE-362

V. Comments for CVE-2026-9030

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