CVE-2026-9031

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BaseFortify

Publication date: 2026-08-07

Last updated on: 2026-08-18

Assigner: TPLink

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-07

Last Modified

2026-08-18

Generated

2026-10-07

AI Q&A

2026-08-08

EPSS Evaluated

2026-10-06

NVD

CVE-2026-9031

EUVD

EUVD-2026-54656

Affected Vendors & Products

Vendor	Product	Version / Range
TP-Link	Systems	Inc. Archer A6 v4 0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This vulnerability is an input validation flaw in the HTTP-WRITEOEM handler. It occurs because user-supplied data is not properly validated before being processed by the internal flash-write handling logic.

Detection Guidance

Detection of this vulnerability requires monitoring for crashes in the httpd process or web interface after sending crafted HTTP requests to the HTTP-WRITEOEM handler. Check system logs for httpd crashes or watch for loss of web interface access. No specific commands are provided in the context.

Impact Analysis

Exploitation may cause the httpd process or device to crash, leading to loss of access to the web interface and a denial-of-service condition.

Compliance Impact

The vulnerability causes a denial-of-service condition by crashing the httpd process or device, leading to loss of access to the web interface. This could disrupt systems handling sensitive data, potentially violating compliance requirements for availability in standards like GDPR or HIPAA.

Mitigation Strategies

Immediately restrict access to the HTTP-WRITEOEM handler by blocking or filtering requests to the affected endpoint. Update or patch the httpd service to the latest version that includes input validation fixes. Monitor network traffic for unusual HTTP requests targeting the vulnerable handler.

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