# CVE-2025-57569: Tenda F3 buffer overflow in /goform/setNAT

Source: https://junglewise.ai/threats/cve-2025-57569-tenda-f3-buffer-overflow-in-goform-setnat  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-09-10. Updated: 2026-07-05  
License: CC BY 4.0 with a link back

CVE-2025-57569 · Severity: medium · CVSS 5.6 · Published 2025-09-10

The Tenda F3 router, a device used to provide wireless internet connectivity in homes and small offices, is affected by a security vulnerability in its web management interface. An attacker could exploit this flaw to cause the device to crash or potentially execute unauthorized commands by sending specially crafted data to the network settings page. This could lead to a loss of internet connectivity or unauthorized access to the router's internal functions.

Technologies: [Tenda F3](https://junglewise.ai/threats/technologies/f3), [Tenda F3 Firmware](https://junglewise.ai/threats/technologies/f3-firmware). Vendors: [Tenda](https://junglewise.ai/threats/vendors/tenda).

## Quick answers

**Is CVE-2025-57569 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-57569 being exploited in the wild.

**How severe is CVE-2025-57569?** Medium severity, with a CVSS score of 5.6, published 10 September 2025.

**Which products and versions are affected?** Tenda F3 Firmware V12.01.01.48_multi and later.

**Is there a fix for CVE-2025-57569?** 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-2025-57569 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2025-57569?** Check whether you run Tenda F3 or Tenda F3 Firmware 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 classic buffer overflow (CWE-120) exists in the Tenda F3 router firmware starting with version V12.01.01.48_multi. The vulnerability is located in the '/goform/setNAT' endpoint, where the 'portList' parameter is processed without adequate bounds checking. An unauthenticated attacker on the network can trigger this overflow by sending a crafted HTTP request. While the attack complexity is rated as high, a successful exploit could lead to a denial-of-service (DoS) condition or potentially remote code execution (RCE). As of the advisory date, users should check for firmware updates from the vendor to mitigate this risk.

## Affected products

- Tenda F3 Firmware V12.01.01.48_multi and later

## Timeline

- 2025-09-10: disclosed
- 2025-09-10: advisory

## References

- [https://github.com/arashiclustar/PingX-md/blob/main/F3/2025-57569/C.V.E-2025-57569.md](https://github.com/arashiclustar/PingX-md/blob/main/F3/2025-57569/C.V.E-2025-57569.md)

## Related threats

- [Tenda N300 F3 unauthenticated UART console and cleartext credential storage](https://junglewise.ai/threats/cve-2026-38571-tenda-n300-f3-unauthenticated-uart-console-and-cleartext)
- [Tenda F3 buffer overflow in goform/setWifi](https://junglewise.ai/threats/cve-2025-57573-tenda-f3-buffer-overflow-in-goform-setwifi)
- [Tenda F3 buffer overflow in goform/setParentControl](https://junglewise.ai/threats/cve-2025-57572-tenda-f3-buffer-overflow-in-goform-setparentcontrol)
- [Tenda F3 buffer overflow in goform/setNAT](https://junglewise.ai/threats/cve-2025-57571-tenda-f3-buffer-overflow-in-goform-setnat)
- [Tenda F3 buffer overflow in goform/setQoS QosList parameter](https://junglewise.ai/threats/cve-2025-57570-tenda-f3-buffer-overflow-in-goform-setqos-qoslist-parameter)