CVE-2007-4277
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 · uneditedThe Trend Micro AntiVirus scan engine before 8.550-1001, as used in Trend Micro PC-Cillin Internet Security 2007, and Tmxpflt.sys 8.320.1004 and 8.500.0.1002, has weak permissions (Everyone:Write) for the \\.\Tmfilter device, which allows local users to send arbitrary content to the device via the IOCTL functionality. NOTE: this can be leveraged for privilege escalation by exploiting a buffer overflow in the handler for IOCTL 0xa0284403.
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 confidenceThe Trend Micro Tmxpflt.sys driver exposes the \\Device\\Tmfilter device with weak Everyone:Write permissions, allowing any local user to send arbitrary IOCTL requests. Combined with a buffer overflow in the IOCTL 0xa0284403 handler, this enables local privilege escalation from any unprivileged user to kernel-level 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 dataall versions<= 8.500CVSS 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
- Local
- Complexity
- Low
- Authentication
- None
- Confidentiality
- None
- Integrity
- Complete
- Availability
- Complete
AV:L/AC:L/Au:N/C:N/I:C/A:C
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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Verify if Tmxpflt.sys driver is loadedOpen Command Prompt and run: sc query Tmxpflt or check driver presence via driverquery /v | findstr TmxpfltAffected if The driver is present and running on the system
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Confirm the vulnerable device existsCheck for the presence of \\Device\\Tmfilter using tools like WinObj or by enumerating kernel objectsAffected if The \\Device\\Tmfilter device object exists on the system
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Check Trend Micro Pc Cillin Internet Security 2007 versionOpen Add or Remove Programs (appwiz.cpl) or check the program files directory for Trend Micro installation and determine the version from the program name or propertiesAffected if Trend Micro Pc Cillin Internet Security 2007 is installed (all versions are affected)
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Determine Trend Micro Scan Engine versionLocate the Trend Micro installation directory (typically under Program Files) and check the version of the scan engine component (often named vsapi32.dll, tmlisten.exe, or similar core engine files)Affected if Scan Engine version is 8.500 or lower
A system is affected if the Tmxpflt.sys driver is loaded and either Pc Cillin Internet Security 2007 is installed or the Scan Engine version is 8.500 or lower, as both conditions expose the vulnerable device with weak permissions and buffer overflow.
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 dataUpdate to Trend Micro AntiVirus scan engine version 8.550-1001 or later which contains the patched driver without the weak permissions and buffer overflow vulnerability.
- Consultation3.0 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 $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2007-4277 — 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-2007-4277 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
- No spam, self-promotion, credentials, or personal data