CVE-2025-7086
Published: 06 July 2025
Summary
CVE-2025-7086 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Belkin F9K1122 Firmware. Its CVSS base score is 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 21.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A critical stack-based buffer overflow vulnerability, tracked as CVE-2025-7086 and also referenced under CWE-119 and CWE-121, affects the Belkin F9K1122 router running firmware 1.00.33. The flaw resides in the formPPTPSetup function of the /goform/formPPTPSetup endpoint within the webs component, where unsanitized input supplied to the pptpUserName argument can overwrite the stack.
An authenticated remote attacker can send a crafted HTTP request to the affected endpoint and trigger memory corruption, leading to arbitrary code execution or a crash of the device. Public proof-of-concept code demonstrating the attack has been published on GitHub, confirming that exploitation requires only network access and valid credentials for the administrative interface.
No vendor patch or official advisory has been issued; the manufacturer was notified prior to disclosure but did not respond. The EPSS score remains low and unchanged at 0.0116, indicating limited observed exploitation activity to date despite the availability of public exploit details.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-20143
Vulnerability details
A vulnerability classified as critical has been found in Belkin F9K1122 1.00.33. Affected is the function formPPTPSetup of the file /goform/formPPTPSetup of the component webs. The manipulation of the argument pptpUserName leads to stack-based buffer overflow. It is possible to…
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launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in the web management interface (/goform/formPPTPSetup) of the Belkin F9K1122 router enables remote code execution via manipulation of pptpUserName, facilitating exploitation of a public-facing application.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Ongoing control assessments and code testing (static/dynamic analysis, fuzzing) surface memory buffer restriction failures, which are then remediated before release.
Managed runtimes used by platform-independent applications (e.g., JVM, CLR) enforce memory safety, preventing most buffer overflows that require direct memory manipulation.
Memory protections (e.g., W^X, ASLR) make exploitation of buffer-boundary violations far harder to turn into code execution.
Detects exploitation attempts that produce memory corruption, crashes, or anomalous behavior.