CVE-2026-41925
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 · uneditedWDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the adm.cgi binary's reboot_time function that allows unauthenticated remote attackers to execute arbitrary shell commands by injecting malicious input into the reboot_time POST parameter. Attackers can send a crafted request with shell metacharacters in the reboot_time parameter when reboot_enabled=1 to achieve remote code execution.
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 WDR201A WiFi Extender firmware contains an OS command injection vulnerability in the adm.cgi binary's reboot_time function. Unauthenticated remote attackers can execute arbitrary shell commands by sending a crafted POST request with shell metacharacters in the reboot_time parameter, but only when reboot_enabled=1 is also set. This allows complete remote code execution on the device.
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:N/SI:N/SA:N/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 device modelAccess the device web interface or check the device label/metadata to confirm the model is WDR201A WiFi ExtenderAffected if Device model is WDR201A
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Check firmware versionNavigate to the device admin interface, typically under Status or System settings, and record the firmware version. Compare against LFMZX28040922V1.02Affected if Firmware version is LFMZX28040922V1.02 or earlier
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Verify adm.cgi endpoint accessibilityAttempt to access the adm.cgi endpoint on the device (typically at /adm.cgi) from the network to confirm it respondsAffected if adm.cgi is reachable over the network
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Check if remote administration is exposedInspect the device network configuration to determine if remote administration or web interface access is enabled for external/network interfaces rather than local LAN onlyAffected if Remote administration is enabled and the device is accessible from untrusted networks
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Check reboot_enabled configurationAccess the device admin settings, typically under System or Advanced settings, and locate the reboot_enabled or scheduled reboot configuration parameterAffected if reboot_enabled is set to enabled or 1
User is affected if they have a WDR201A WiFi Extender running firmware LFMZX28040922V1.02 or earlier, with adm.cgi accessible and reboot_enabled enabled, especially if remote administration is exposed to untrusted networks
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 patches when available; until then, disable the device from untrusted networks or replace with a supported device, as network-level filtering alone cannot fully mitigate input validation flaws in embedded firmware.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-41925 — 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-2026-41925 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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