What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.8 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-07 · updated 2026-10-24
• Weakness: CWE-20

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.

Affected products

• TP-Link Systems Inc. Archer A6 v4: before V4_1.15.10 Build 260625 Rel.25447 — fixed in V4_1.15.10 Build 260625 Rel.25447

How to fix

Upgrade to a fixed version: TP-Link Systems Inc. Archer A6 v4 V4_1.15.10 Build 260625 Rel.25447. Check the vendor advisory for mitigations.

References

• https://www.tp-link.com/en/support/download/archer-a6/v4/#Firmware
• https://www.tp-link.com/en/support/faq/5234/
• https://www.tp-link.com/us/support/download/archer-a6/v4/#Firmware

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