CVE-2025-8245
Published: 27 July 2025
Summary
CVE-2025-8245 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Totolink X15 Firmware. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 29.7% of CVEs by exploit likelihood; 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
SI-10 requires validation of information inputs like the 'submit-url' argument to prevent buffer overflows from malformed HTTP POST requests.
SI-16 implements memory protections such as stack canaries or DEP to mitigate exploitation of buffer overflows in the HTTP handler.
SI-2 mandates timely remediation of identified flaws like this buffer overflow through firmware patching.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in public-facing web interface (/boafrm/formMultiAPVLAN) via remote HTTP POST enables exploitation of public-facing application (T1190) and application/system exploitation for denial of service (T1499.004).
NVD Description
A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /boafrm/formMultiAPVLAN of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads…
more
to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
Deeper analysisAI
CVE-2025-8245 is a critical buffer overflow vulnerability (CWE-119, CWE-120) in the TOTOLINK X15 router running firmware version 1.0.0-B20230714.1105. The issue affects an unknown functionality within the /boafrm/formMultiAPVLAN file of the HTTP POST Request Handler component. It is triggered by manipulating the "submit-url" argument in a crafted request, leading to a buffer overflow condition.
The vulnerability can be exploited remotely over the network with low attack complexity and requires low privileges, such as those of an authenticated user (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, score 8.8). Attackers can achieve high impacts on confidentiality, integrity, and availability, potentially allowing arbitrary code execution or denial of service. A proof-of-concept exploit has been publicly disclosed and may be used by threat actors.
Advisories from VulDB and a GitHub repository detail the vulnerability and provide an exploit POC at https://github.com/panda666-888/vuls/blob/main/totolink/x15/formMultiAPVLAN.md, while the vendor site at https://www.totolink.net/ is referenced for potential updates, though no specific patches are mentioned in the available information.
The exploit disclosure heightens the risk for exposed TOTOLINK X15 devices, urging practitioners to isolate affected systems until firmware updates are confirmed.
Details
- CWE(s)