CVE-2025-8242
Published: 27 July 2025
Summary
CVE-2025-8242 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 19.2% 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
Directly validates HTTP POST parameters such as ip6addr, url, vpnPassword, and vpnUser to prevent buffer overflows from malformed inputs in the /boafrm/formFilter handler.
Implements memory protections like stack canaries, ASLR, and non-executable memory to mitigate remote exploitation of the buffer overflow vulnerability.
Ensures timely remediation by applying firmware patches or updates to address the specific buffer overflow in the TOTOLINK X15 HTTP POST Request Handler.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in publicly exposed router web interface (/boafrm/formFilter HTTP handler) directly enables remote exploitation for code execution or full compromise.
NVD Description
A vulnerability has been found in TOTOLINK X15 1.0.0-B20230714.1105 and classified as critical. This vulnerability affects unknown code of the file /boafrm/formFilter of the component HTTP POST Request Handler. The manipulation of the argument ip6addr/url/vpnPassword/vpnUser leads to buffer overflow. The…
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attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
Deeper analysisAI
CVE-2025-8242 is a critical buffer overflow vulnerability (CWE-119, CWE-120) affecting the TOTOLINK X15 router on firmware version 1.0.0-B20230714.1105. The flaw exists in unknown code within the /boafrm/formFilter file of the HTTP POST Request Handler component, triggered by manipulation of arguments including ip6addr, url, vpnPassword, or vpnUser.
Attackers can exploit this vulnerability remotely with low attack complexity and low privileges required (PR:L), without user interaction. The CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects high impacts on confidentiality, integrity, and availability, potentially enabling remote code execution or system compromise.
Proof-of-concept exploits targeting parameters like ip6addr and url have been publicly disclosed on GitHub repositories such as panda666-888/vuls, with further details documented on VulDB entries including ctiid.317830 and id.317830. No specific patches or mitigation guidance are detailed in the referenced advisories.
The exploit has been disclosed to the public and may be used, as noted in the vulnerability description published on 2025-07-27.
Details
- CWE(s)