CVE-2025-34043
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 remote command injection vulnerability exists in Vacron Network Video Recorder (NVR) devices v1.4 due to improper input sanitization in the board.cgi script. The vulnerability allows unauthenticated attackers to pass arbitrary commands to the underlying operating system via crafted HTTP requests. These commands are executed with the privileges of the web server process, enabling remote code execution and potential full device compromise. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-06 UTC.
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 confidenceVacron NVR v1.4 contains a remote command injection vulnerability in board.cgi where unsanitized user input is passed to system shell execution, allowing unauthenticated attackers to execute arbitrary OS commands with web server privileges.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Authentication
- X
- User interaction
- None
- Scope
- X
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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 the device as a Vacron NVRLog into the device web interface or check the device label/serial number to confirm it is a Vacron NVR product. The web interface typically displays the device model and manufacturer on the login page or in the system information section.Affected if The device is a Vacron NVR model running firmware v1.4
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Confirm firmware version is v1.4Access the web interface admin panel and navigate to System Settings or About page to view the installed firmware version. Compare this version number to the affected range.Affected if The installed firmware version is exactly v1.4 (no other versions were listed as affected)
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Verify board.cgi endpoint is present and accessibleAttempt to access the board.cgi endpoint via HTTP/HTTPS request (e.g., GET http://[device-ip]/cgi-bin/board.cgi). Check if the endpoint responds or returns any output.Affected if The board.cgi endpoint exists and responds to requests, indicating the vulnerable component is present
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Check network exposure of the web interfaceReview firewall rules or network configuration to determine if the Vacron NVR web interface (port 80/443) is accessible from untrusted networks or the public internet. Use external port scanning tools or review router/firewall ACLs.Affected if The web interface is accessible from unauthenticated/untrusted network segments, allowing remote attackers to reach the board.cgi endpoint
The environment is affected if it is a Vacron NVR running firmware v1.4 with the board.cgi endpoint accessible to unauthenticated network 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 dataApply vendor firmware patch when available; until then, restrict network access to the device's web interface via firewall rules or disable the affected CGI endpoint if possible.
- Consultation4.0 h
- Implementation8.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-34043 — 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-2025-34043 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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