Is CVE-2025-51089 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-51089 being exploited in the wild.

How severe is CVE-2025-51089?

Medium severity, with a CVSS score of 6.5, published 24 July 2025.

Which products and versions are affected?

Tenda AC8V4 firmware V16.03.34.06.

Is there a fix for CVE-2025-51089?

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-2025-51089 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2025-51089?

Check whether you run Tenda Ac8, Tenda Ac8 Firmware or Tenda AC8V4 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.

CVE-2025-51089: Tenda AC8V4 heap overflow in GetParentControlInfo

CVE-2025-51089 · Severity: medium · CVSS 6.5 · Published 2025-07-24

A security vulnerability exists in the Tenda AC8V4 home router, a device used to provide wireless internet access. An attacker can send a specially crafted request to the router's management interface to cause a system crash or potentially gain unauthorized control over the device. This could lead to a loss of internet connectivity or allow an attacker to disrupt network operations.

Technologies: Tenda Ac8, Tenda Ac8 Firmware. Vendors: Tenda.

Quick answers

Is CVE-2025-51089 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2025-51089 being exploited in the wild.
How severe is CVE-2025-51089?: Medium severity, with a CVSS score of 6.5, published 24 July 2025.
Which products and versions are affected?: Tenda AC8V4 firmware V16.03.34.06.
Is there a fix for CVE-2025-51089?: 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-2025-51089 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2025-51089?: Check whether you run Tenda Ac8, Tenda Ac8 Firmware or Tenda AC8V4 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 heap-based buffer overflow (CWE-122) exists in the Tenda AC8V4 router firmware version V16.03.34.06. The vulnerability is located within the 'GetParentControlInfo' function, which processes POST requests to the '/goform/GetParentControlInfo' endpoint. The application fails to validate the length of the 'mac' parameter before copying it into a heap-allocated buffer using the 'strcpy' function. A remote, unauthenticated attacker can exploit this by sending an oversized 'mac' string, leading to memory corruption, a denial-of-service (DoS) condition, or potentially arbitrary code execution. A proof-of-concept exploit demonstrating the crash is publicly available.

Affected products

Tenda AC8V4 firmware V16.03.34.06

Timeline

2025-07-24: advisory: NVD publication date

References

https://github.com/TL-SN/IOT/blob/main/Tenda/Tenda-AC8v4%20%20V16.03.34.06/CVE-2025-51089.md

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