CVE-2025-7089
Published: 06 July 2025
Summary
CVE-2025-7089 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 stack-based buffer overflow vulnerability, tracked as CVE-2025-7089 and also referenced under CWE-119 and CWE-121, affects the Belkin F9K1122 router running firmware 1.00.33. It resides in the formWanTcpipSetup function of the /goform/formWanTcpipSetup endpoint within the webs component, where unsanitized input to the pppUserName argument can overwrite the stack.
An authenticated remote attacker can trigger the flaw by submitting a crafted HTTP request to the management interface, leading to arbitrary code execution, privilege escalation, or a crash of the affected process. The attack requires no user interaction beyond valid credentials and can be launched over the network.
Public references, including a detailed disclosure and proof-of-concept on GitHub along with entries on VulDB, confirm the issue and note that the vendor was notified but provided no response or patch. No official mitigation guidance is available from the vendor.
The EPSS score remains flat at 0.0116 with no material rise after disclosure, and no reports of in-the-wild exploitation have been observed.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-20148
Vulnerability details
A vulnerability was found in Belkin F9K1122 1.00.33 and classified as critical. This issue affects the function formWanTcpipSetup of the file /goform/formWanTcpipSetup of the component webs. The manipulation of the argument pppUserName leads to stack-based buffer overflow. The attack may…
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be initiated 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 router's remote web management interface (/goform/formWanTcpipSetup) via pppUserName enables remote exploitation for initial access, mapping to public-facing application exploitation and remote service exploitation.
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.