# CVE-2026-76651: TP-Link TL-WR841N buffer overflow in HTTP service

Source: https://junglewise.ai/threats/cve-2026-76651-tp-link-tl-wr841n-buffer-overflow-in-http-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-28. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-76651 · Severity: info · Published 2026-08-28

The TL-WR841N wireless router contains a buffer overflow vulnerability in its embedded web management interface when processing file upload requests with specially crafted boundaries. An attacker on the network can send a malicious request that corrupts the router's memory, potentially causing the device to malfunction or crash, disrupting network connectivity for all users relying on that router.

Technologies: [TP-Link TL-WR841N](https://junglewise.ai/threats/technologies/tl-wr841n). Vendors: [TP-Link](https://junglewise.ai/threats/vendors/tp-link).

## Quick answers

**Is CVE-2026-76651 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76651 being exploited in the wild.

**How severe is CVE-2026-76651?** Informational severity, published 28 August 2026.

**Which products and versions are affected?** TP-Link TL-WR841N v14.

**Is there a fix for CVE-2026-76651?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-76651 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-76651?** Check whether you run TP-Link TL-WR841N at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A buffer overflow vulnerability exists in the HTTP service of TP-Link TL-WR841N v14 when processing multipart/form-data requests. The vulnerability stems from insufficient validation of the attacker-controlled boundary parameter, which allows an unauthenticated remote attacker to overwrite data beyond buffer bounds. The attack requires no authentication and is reachable over the network. Exploitation may result in memory corruption and undefined application behavior, though arbitrary code execution, information disclosure, and denial-of-service have not been demonstrated. No patch information is currently available.

## Affected products

- TP-Link TL-WR841N v14

## Timeline

- 2026-08-28: disclosed

## References

- [https://www.tp-link.com/en/support/download/tl-wr841n/v14/](https://www.tp-link.com/en/support/download/tl-wr841n/v14/)
- [https://www.tp-link.com/us/support/download/tl-wr841n/v14/](https://www.tp-link.com/us/support/download/tl-wr841n/v14/)

## Related threats

- [TP-Link TL-WR841N OS command injection in IPv6 WAN configuration](https://junglewise.ai/threats/cve-2026-102294-tp-link-tl-wr841n-contains-an-authenticated-os-command-injection)
- [TP-Link TL-WR841N v14 NULL pointer dereference in UPnP](https://junglewise.ai/threats/cve-2026-76650-tp-link-tl-wr841n-v14-null-pointer-dereference-in-upnp)
- [TP-Link TL-WR841N NULL pointer dereference in UPnP service](https://junglewise.ai/threats/cve-2026-76649-tp-link-tl-wr841n-null-pointer-dereference-in-upnp-service)
- [TP-Link TL-WR841N stack overflow in web management interface](https://junglewise.ai/threats/cve-2026-9105-tp-link-tl-wr841n-stack-overflow-in-web-management-interface)
- [TP-Link TL-WR841N v13 uses DES-CBC encryption in the TDDPv2 debug protocol with a cryptographic key derived from…](https://junglewise.ai/threats/cve-2026-5039-tp-link-tl-wr841n-v13-uses-des-cbc-encryption-in-the-tddpv2-debug)