CVE-2025-7088
Published: 06 July 2025
Summary
CVE-2025-7088 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 exists in the Belkin F9K1122 router running firmware 1.00.33. The flaw resides in the formPPPoESetup function of the /goform/formPPPoESetup endpoint within the webs component, where unsanitized input to the pppUserName argument can overwrite the stack. The issue is tracked as CVE-2025-7088 and carries a CVSS 4.0 score of 7.4.
An authenticated remote attacker can send a crafted HTTP request to trigger the overflow, resulting in arbitrary code execution or denial of service on the device. The attack requires no user interaction and can be launched over the network with low attack complexity. Public proof-of-concept code has been released that demonstrates the exploit.
The vendor was notified prior to disclosure but has not issued a response or patch. The available references consist of technical write-ups and exploit details hosted on GitHub and Vuldb, with no official mitigation guidance provided.
EPSS for the CVE remains flat at 0.0116 with no material increase since publication.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-20145
Vulnerability details
A vulnerability, which was classified as critical, was found in Belkin F9K1122 1.00.33. This affects the function formPPPoESetup of the file /goform/formPPPoESetup of the component webs. The manipulation of the argument pppUserName leads to stack-based buffer overflow. It is possible…
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to initiate 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 publicly accessible web interface (/goform/formPPPoESetup) of the Belkin F9K1122 router enables remote code execution, facilitating exploitation of a public-facing application for initial access.
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.