CVE-2026-9031: CWE-20 Improper input validation in TP-Link Systems Inc. Archer A6 v4
CVE-2026-9031 is an input validation vulnerability in the HTTP-WRITEOEM handler of TP-Link Systems Inc. Archer A6 v4. Insufficient validation of user-supplied data before processing by internal flash-write logic can lead to a crash of the httpd process or the device itself. This results in loss of access to the web interface and causes a denial-of-service condition. The vulnerability has a medium severity with a CVSS score of 6.8. No patch or official remediation information is currently available.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-9031) affects TP-Link Archer A6 v4 routers. It arises from improper input validation (CWE-20) in the HTTP-WRITEOEM handler, where user-supplied data is not sufficiently validated before being processed by internal flash-write handling logic. Exploiting this flaw can cause the httpd process or the entire device to crash, leading to denial of service by making the web interface inaccessible. The CVSS 4.0 vector indicates the attack requires adjacent network access, low attack complexity, no user interaction, and high impact on availability. No known exploits or patches are currently documented.
Potential Impact
Successful exploitation results in denial of service by crashing the httpd process or the device, causing loss of access to the router's web interface. This disrupts management and configuration capabilities but does not indicate direct code execution or data compromise based on the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Monitor TP-Link's advisories for updates and apply any future patches promptly.
CVE-2026-9031: CWE-20 Improper input validation in TP-Link Systems Inc. Archer A6 v4
Description
CVE-2026-9031 is an input validation vulnerability in the HTTP-WRITEOEM handler of TP-Link Systems Inc. Archer A6 v4. Insufficient validation of user-supplied data before processing by internal flash-write logic can lead to a crash of the httpd process or the device itself. This results in loss of access to the web interface and causes a denial-of-service condition. The vulnerability has a medium severity with a CVSS score of 6.8. No patch or official remediation information is currently available.
CVSS v4.0
Score 6.8medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-9031) affects TP-Link Archer A6 v4 routers. It arises from improper input validation (CWE-20) in the HTTP-WRITEOEM handler, where user-supplied data is not sufficiently validated before being processed by internal flash-write handling logic. Exploiting this flaw can cause the httpd process or the entire device to crash, leading to denial of service by making the web interface inaccessible. The CVSS 4.0 vector indicates the attack requires adjacent network access, low attack complexity, no user interaction, and high impact on availability. No known exploits or patches are currently documented.
Potential Impact
Successful exploitation results in denial of service by crashing the httpd process or the device, causing loss of access to the router's web interface. This disrupts management and configuration capabilities but does not indicate direct code execution or data compromise based on the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Monitor TP-Link's advisories for updates and apply any future patches promptly.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TPLink
- Date Reserved
- 2026-05-19T16:30:34.816Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a76468dbf8831d53924fd9d
Added to database: 08/07/2026, 20:56:45 UTC
Last enriched: 08/07/2026, 21:14:26 UTC
Last updated: 08/07/2026, 21:16:37 UTC
Views: 4
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