TP-Link RE210 AC750 httpd splitString buffer overflow

Summaryinfo

A vulnerability was found in TP-Link RE210 AC750. It has been rated as very critical. Affected by this issue is the function splitString of the component httpd. This manipulation causes buffer overflow. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is registered as CVE-2026-85384. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in TP-Link RE210 AC750 (version unknown) and classified as very critical. Affected by this vulnerability is the function splitString of the component httpd. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A stack-based buffer overflow vulnerability exists in the httpd component of RE210 AC750 due to improper bounds checking in the splitString function when processing an uploaded configuration file. An authenticated attacker on the local network can upload a crafted configuration file to trigger the overflow, leading to remote code execution. Successful exploitation may allow unauthorized access to sensitive information, modification of device configuration and network behavior, or disruption of device availability.

The advisory is shared at tp-link.com. This vulnerability is known as CVE-2026-85384 since 09/03/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/08/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• TP-Link

Name

• RE210 AC750

License

• commercial

Support

• end of life

Website

• Vendor: https://www.tp-link.com/

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion