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8.7
CVE-2025-4140: Netgear EX6120 Router: Attackers can crash the device remotely
CVE-2025-4140 · published 1 year ago
Summary
A critical flaw in the Netgear EX6120 router allows attackers to crash the device by sending a specially crafted request. This could lead to a denial-of-service, making the router unavailable. Update the router's firmware to the latest version to fix the issue.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| netgear | ex6120_firmware |
1.0.3.94 cpe:2.3:o:netgear:ex6120_firmware:1.0.3.94:*:*:*:*:*:*:* |
Original advisory text
A vulnerability, which was classified as critical, has been found in Netgear EX6120 1.0.3.94. Affected by this issue is the function sub_30394. The manipulation of the argument host leads to buffer...
A vulnerability, which was classified as critical, has been found in Netgear EX6120 1.0.3.94. Affected by this issue is the function sub_30394. The manipulation of the argument host leads to buffer overflow. The attack may be launched remotely. The vendor was contacted early about this disclosure but did not respond in any way.
References
- https://github.com/jylsec/vuldb/blob/main/Netgear/netgear_ex6200/Buffer_overflow... Exploit
- https://vuldb.com/?ctiid.306632 Permissions Required VDB Entry
- https://vuldb.com/?id.306632 Third Party Advisory VDB Entry
- https://vuldb.com/?submit.560788 Third Party Advisory VDB Entry
- https://www.netgear.com/ Product
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker full control
Type
CWE-119Buffer Overflow
CWE-120Classic Buffer Overflow
Timeline
Published30 Apr 2025
Updated31 Oct 2026
First seen7 Mar 2026
Sources
CVE-2025-4140 · NVD
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