CVE-2025-4116
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA vulnerability, which was classified as critical, has been found in Netgear JWNR2000v2 1.0.0.11. Affected by this issue is the function get_cur_lang_ver. 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceBuffer overflow vulnerability in Netgear JWNR2000v2 router firmware 1.0.0.11 in the get_cur_lang_ver function. The function fails to properly validate the length of the 'host' argument before copying it into a fixed-size buffer, allowing remote attackers to overflow the buffer and potentially achieve remote code execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 1.0.0.11CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify router modelCheck the device label or admin interface to confirm the exact model is Netgear JWNR2000v2Affected if Device is not a JWNR2000v2 router, then not affected
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Check firmware versionLog into the router admin interface (typically at 192.168.1.1) and navigate to Administration > Firmware Update or check the status page to view the firmware versionAffected if Firmware version is exactly 1.0.0.11 - other versions are not affected by this specific CVE
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Verify the vulnerable function existsThis vulnerability is in the get_cur_lang_ver function which handles language version requests. This is typically accessed via the web interface endpoints related to language/region settingsAffected if The function is present in firmware 1.0.0.11 and processes the 'host' argument without proper length validation
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Check remote management exposureIn the router admin interface, go to Administration > Remote Management to determine if remote administrative access is enabled. Also check if the device is directly exposed to the internet (public IP address)Affected if Remote management is enabled and the device is accessible from untrusted networks, increasing exploitability
You are affected if you have a Netgear JWNR2000v2 router running firmware version 1.0.0.11 and the router admin interface or specific language-related endpoints are accessible to attackers.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataAs the vendor has not responded, immediate mitigation is limited; consider network segmentation to limit exposure, disable remote management if possible, and monitor for vendor firmware updates. Replacement of the affected device may be necessary if no patch becomes available.
- Consultation8.0 h
- Implementation24.0 h
- Testing16.0 h
- Review / QA8.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-4116 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-4116 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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