Quick answers
- Is CVE-2025-51088 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-51088 being exploited in the wild.
- How severe is CVE-2025-51088?
- Medium severity, with a CVSS score of 5.3, published 24 July 2025.
- Which products and versions are affected?
- Tenda AC8V4 V16.03.34.06.
- Is there a fix for CVE-2025-51088?
- 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-2025-51088 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2025-51088?
- Check whether you run Tenda Ac8, Tenda Ac8 Firmware or Tenda AC8V4 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 Tenda AC8V4 router firmware version V16.03.34.06. The vulnerability is located within the 'fromSetWifiGusetBasic' function, which processes POST requests to the '/goform/WifiGuestSet' endpoint. The 'shareSpeed' parameter is retrieved from the user request without length validation and is subsequently passed to a 'strcpy' function, leading to a stack overflow. A remote, unauthenticated attacker can exploit this by sending a long string in the 'shareSpeed' field, potentially causing a denial-of-service (DoS) condition. A proof-of-concept exploit using a 2000-byte payload has been publicly disclosed.
Affected products
- Tenda AC8V4 V16.03.34.06
Timeline
- 2025-07-24: advisory: Initial NVD publication
- 2025-07-24: disclosed: Public GitHub advisory and PoC released