CVE-2025-25663
Published: 20 February 2025
Summary
CVE-2025-25663 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Tenda Ac8 Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 25.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly prevents stack-based buffer overflow by validating the wpapsk_crypto argument in /goform/WifiExtraSet before processing.
Provides memory protections such as stack canaries to mitigate exploitation of the buffer overflow vulnerability even if invalid input reaches the function.
Requires timely remediation of the identified buffer overflow flaw in Tenda AC8V4 firmware version V16.03.34.06 to eliminate the vulnerability.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in the public-facing web interface (/goform/WifiExtraSet) enables remote code execution via exploitation of a public-facing application.
NVD Description
A vulnerability was found in Tenda AC8V4 V16.03.34.06. Affected is the function SUB_0046AC38 of the file /goform/WifiExtraSet. The manipulation of the argument wpapsk_crypto leads to stack-based buffer overflow.
Deeper analysisAI
CVE-2025-25663 is a stack-based buffer overflow vulnerability affecting Tenda AC8V4 router firmware version V16.03.34.06. The flaw exists in the SUB_0046AC38 function of the /goform/WifiExtraSet file, where manipulation of the wpapsk_crypto argument triggers the overflow. It maps to CWE-787 (Out-of-bounds Write) and CWE-120 (Buffer Copy without Checking Size of Input), and was published on 2025-02-20.
With a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), the vulnerability enables exploitation over the network with low complexity, requiring no authentication or user interaction. Unauthenticated remote attackers can achieve high-impact effects on confidentiality, integrity, and availability, likely leading to arbitrary code execution on the device.
Technical details on the vulnerability, including exploitation specifics, are documented in the advisory at https://github.com/jangfan/my-vuln/blob/main/Tenda/AC8V4/WifiExtraSet.md. No patch or mitigation guidance is specified in the available description.
Details
- CWE(s)