CVE-2025-34054
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 · uneditedAn unauthenticated command injection vulnerability exists in AVTECH DVR devices via Search.cgi?action=cgi_query. The use of wget without input sanitization allows attackers to inject shell commands through the username or queryb64str parameters, executing commands as root. Exploitation evidence was observed by the Shadowserver Foundation on 2025-01-04 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 confidenceUnauthenticated command injection vulnerability in AVTECH DVR devices allows remote attackers to execute arbitrary shell commands as root via the Search.cgi endpoint. The vulnerability stems from unsafe use of the wget command without proper input sanitization on the username and queryb64str parameters.
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 AVTECH DVR devices on the networkScan network for devices with AVTECH DVR web interfaces by checking HTTP responses for AVTECH headers or branding, or review device inventory/management interfaces for AVTECH device entriesAffected if Any AVTECH DVR device is present on the network
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Verify Search.cgi endpoint accessibilityAttempt an HTTP request to /cgi-bin/nfcgi/Search.cgi with the parameter action=cgi_query on the suspected AVTECH device (e.g., GET /cgi-bin/nfcgi/Search.cgi?action=cgi_query)Affected if The endpoint responds without requiring authentication
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Check for external network exposureReview firewall rules, port forwarding configurations, and NAT settings to determine if the DVR web interface (typically ports 80, 443, or 8080) is accessible from public IP addressesAffected if The Search.cgi endpoint is reachable from the internet without VPN or authentication barrier
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Confirm the vulnerable parameters are acceptedSend a test request with action=cgi_query along with username or queryb64str parameters to see if the endpoint processes themAffected if The device accepts and processes these parameters without rejecting them
If an AVTECH DVR device has its Search.cgi endpoint (action=cgi_query) exposed to the network without authentication, the device is affected by this command injection vulnerability.
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-supplied firmware patches when available; otherwise, isolate affected devices on restricted network segments and block external access to the Search.cgi interface.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-34054 — 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-2025-34054 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
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- Version or environment caveats, and links to real fixes
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