CVE-2025-4142
Published: 30 April 2025
Summary
CVE-2025-4142 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Netgear Ex6200 Firmware. Its CVSS base score is 8.7 (High).
Operationally, ranked in the top 20.0% 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 vulnerability classified as critical has been identified in the Netgear EX6200 firmware version 1.0.3.94, specifically within the function sub_3C8EC. The issue stems from improper handling of the host argument, resulting in a buffer overflow condition tracked under CWE-119 and CWE-120. The flaw is remotely triggerable and carries a CVSS 4.0 score of 8.7, reflecting high impact on confidentiality, integrity, and availability without requiring user interaction or elevated privileges beyond a low-privileged account.
An attacker with network access and valid low-privileged credentials can supply a crafted host value to the affected function, leading to memory corruption that may enable arbitrary code execution or a denial-of-service condition on the device. Because the attack vector is remote and the device is a consumer wireless range extender, successful exploitation could allow an adversary to compromise the device and potentially pivot into the attached local network.
The vendor was notified prior to disclosure but provided no response or patch information. Public references consist of a technical write-up on GitHub and entries in the VulDB database, with no official advisory or firmware update referenced from Netgear. The associated EPSS score remains flat at 0.0128 with no observed increase, indicating limited evidence of emerging exploitation interest following publication.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-12785
Vulnerability details
A vulnerability has been found in Netgear EX6200 1.0.3.94 and classified as critical. This vulnerability affects the function sub_3C8EC. The manipulation of the argument host leads to buffer overflow. The attack can be initiated remotely. The vendor was contacted early…
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about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
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.
Managed runtimes used by platform-independent applications (e.g., JVM, CLR) enforce memory safety, preventing most buffer overflows that require direct memory manipulation.
Ongoing control assessments and code testing (static/dynamic analysis, fuzzing) surface memory buffer restriction failures, which are then remediated before release.
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.