# CVE-2025-57571: Tenda F3 buffer overflow in goform/setNAT

Source: https://junglewise.ai/threats/cve-2025-57571-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-2025-57571 · Severity: medium · CVSS 5.6 · Published 2025-09-10

Tenda F3 wireless routers are affected by a security flaw in their network management interface. An attacker could potentially crash the device or gain unauthorized control by sending specially crafted network configuration data. This could lead to a loss of internet connectivity for connected users or allow an attacker to intercept network traffic.

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-2025-57571 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-57571 being exploited in the wild.

**How severe is CVE-2025-57571?** Medium severity, with a CVSS score of 5.6, published 10 September 2025.

**Which products and versions are affected?** Tenda F3 Firmware 12.01.01.48_multi and later.

**Is there a fix for CVE-2025-57571?** 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-2025-57571 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2025-57571?** 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, specifically within the 'goform/setNAT' endpoint. The vulnerability is triggered by providing an overly long string to the 'macFilterList' parameter, which the application fails to properly bounds-check before copying into memory. While the attack vector is listed as network-based, the CVSS score reflects high complexity, likely due to specific configuration requirements or environmental factors needed to reach the vulnerable code path. Successful exploitation could lead to memory corruption, resulting in a denial-of-service (DoS) condition or potentially remote code execution (RCE). As of the advisory date, the vendor has not officially confirmed a patch for this specific version range.

## Affected products

- Tenda F3 Firmware 12.01.01.48_multi and later

## Timeline

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

## References

- [https://github.com/arashiclustar/PingX-md/blob/main/F3/2025-57571/C.V.E-2025-57571.md](https://github.com/arashiclustar/PingX-md/blob/main/F3/2025-57571/C.V.E-2025-57571.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/setQoS QosList parameter](https://junglewise.ai/threats/cve-2025-57570-tenda-f3-buffer-overflow-in-goform-setqos-qoslist-parameter)
- [Tenda F3 buffer overflow in /goform/setNAT](https://junglewise.ai/threats/cve-2025-57569-tenda-f3-buffer-overflow-in-goform-setnat)