CVE-2025-12265
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 weakness has been identified in Tenda CH22 1.0.0.1. Affected by this issue is the function fromVirtualSer of the file /goform/VirtualSer. This manipulation of the argument page causes buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.
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 · high confidenceBuffer overflow vulnerability in Tenda CH22 router firmware version 1.0.0.1 allows remote attackers to overflow a buffer via the 'page' parameter in the fromVirtualSer function within /goform/VirtualSer. The lack of proper input validation on the page argument enables memory corruption that can be exploited remotely.
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= 1.0.0.1CVSS 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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Confirm device model is Tenda CH22Access the router web interface or check the device label/marketing materials to verify the exact model number is CH22Affected if Device is not a Tenda CH22 router, then it is not affected by this specific CVE
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Check firmware versionLog into the router web management interface and navigate to System Settings > Firmware Upgrade, or check via CLI if available, to identify the installed firmware versionAffected if Firmware version is 1.0.0.1 - only this exact version is listed as affected
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Verify VirtualSer form is accessibleAttempt to access the /goform/VirtualSer endpoint on the router by sending an HTTP request to your router's IP address with the path /goform/VirtualSerAffected if The endpoint responds, indicating the vulnerable function is present and reachable
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Confirm web management interface is exposedDetermine if the router's web interface is accessible from untrusted networks by checking your network configuration, firewall rules, or by attempting external access to the router's IPAffected if The web management interface is externally accessible, which enables remote exploitation of this vulnerability
You are affected if you have a Tenda CH22 router running firmware version 1.0.0.1 with its web management interface accessible to the network where an attacker could reach the /goform/VirtualSer endpoint.
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 dataImmediately restrict network access to the router's administrative web interface, disable virtual server functionality if possible, and monitor for the public exploit usage. Apply vendor firmware updates when available or consider replacing the end-of-life device.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-12265 — 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-2025-12265 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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