CVE-2025-61498: Tenda AC8 buffer overflow in UPnP service

CVE-2025-61498 · Severity: high · CVSS 7.5 · Published 2025-10-30

A security vulnerability has been identified in the Tenda AC8 router, a device used to provide wireless internet connectivity. An attacker can send a specially crafted network packet to the device's UPnP service to cause it to crash or become unresponsive. This results in a denial-of-service, disrupting internet access for all connected users and requiring a manual restart of the hardware.

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

Quick answers

Is CVE-2025-61498 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-61498 being exploited in the wild.
How severe is CVE-2025-61498?
High severity, with a CVSS score of 7.5, published 30 October 2025.
Which products and versions are affected?
Tenda Ac8 v03.03.10.01.
Is there a fix for CVE-2025-61498?
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-2025-61498 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2025-61498?
Check whether you run Tenda Ac8 or Tenda Ac8 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 stack-based buffer overflow (CWE-121) exists in the UPnP service of Tenda AC8 hardware running firmware version v03.03.10.01. The vulnerability is triggered when the service processes a specially crafted network packet, leading to memory corruption. This is a network-reachable exploit that requires no authentication or user interaction. Successful exploitation results in a Denial of Service (DoS) condition, crashing the service or the entire device. No official patch or mitigation was detailed in the advisory, though disabling UPnP is a standard workaround for such vulnerabilities.

Affected products

  • Tenda AC8 v03.03.10.01

Timeline

  • 2025-10-30: disclosed
  • 2025-10-30: advisory

References

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