CVE-2025-59366
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 authentication-bypass vulnerability exists in AiCloud. This vulnerability can be triggered by an unintended side effect of the Samba functionality, potentially leading to allow execution of specific functions without proper authorization. Refer to the Security Update for ASUS Router Firmware section on the ASUS Security Advisory for more information.
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 · moderate confidenceAn authentication-bypass vulnerability in ASUS AiCloud allows execution of specific functions without proper authorization, triggered by an unintended side effect of the Samba functionality in the router firmware.
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:P/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 router model and firmware versionAccess router web interface (usually 192.168.1.1) and navigate to Administration > Firmware Upgrade or General > System to view the current firmware version and exact router model number.Affected if Router model has AiCloud capability and firmware version is older than the patched version from ASUS Security Advisory for CVE-2025-59366
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Verify AiCloud service is enabledIn router web interface, go to AiCloud (or USB Application > AiCloud) and check if the AiCloud service toggle is turned ON or enabled.Affected if AiCloud is enabled on the router - this is a required condition for the vulnerability to be exploitable
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Verify Samba/Network Place sharing is enabledIn router web interface, navigate to USB Application > Samba Share or Network Place (Samba) and confirm if the Samba sharing feature is turned ON or enabled.Affected if Samba/Network Place sharing is enabled - combined with AiCloud being enabled, this creates the side effect that allows authentication bypass
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Check for unauthenticated AiCloud function accessAttempt to access AiCloud functions directly (such as cloud URL paths like /AiCloud/ or /cloud_cmd) without providing credentials to see if unauthorized access is possible - this would indicate the vulnerability is present.Affected if AiCloud functions are accessible without authentication when both AiCloud and Samba are enabled, confirming exploitation of the vulnerability
The environment is affected if an ASUS router has AiCloud enabled AND Samba/Network Place sharing enabled, with a firmware version prior to the CVE-2025-59366 security patch.
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 the latest ASUS router firmware security update from the official ASUS Security Advisory to address this authentication bypass in AiCloud.
- Consultation4.0 h
- Implementation2.0 h
- Testing6.0 h
- Review / QA3.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-59366 — 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-2025-59366 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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