CVE-2026-32678
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 · uneditedAuthentication bypass issue exists in BUFFALO Wi-Fi router products, which may allow an attacker to alter critical configuration settings without authentication.
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 confidenceThis is an authentication bypass vulnerability in BUFFALO Wi-Fi routers that allows unauthenticated attackers to modify critical configuration settings. The vulnerability likely involves a flaw in the router's authentication mechanism that can be bypassed through manipulated requests, enabling attackers to gain administrative access without valid credentials.
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< 1.01< 6.02< 5.02< 2.63< 2.63< 5.03< 2.53CVSS 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
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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 your Buffalo router modelLocate the model number on the router device or check the administration interface for the exact model designation (often found on the status or system information page)Affected if The model is one of: Wzr S900dhp, Wcr 1166dhpl, Wsr3600be4 Kh, Wsr3600be4p, Wxr 1750dhp, Wxr 1750dhp2, Wxr18000be10p, or Wxr 1900dhp
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Check the installed firmware versionAccess the router web interface and navigate to the administration or system settings page to view the current firmware version; alternatively, check the vendor documentation for CLI or backup config file methodsAffected if The firmware version falls outside the fixed versions: Wcr 1166dhpl (1.01+), Wsr3600be4 Kh (6.02+), Wsr3600be4p (5.02+), Wxr 1750dhp (2.63+), Wxr 1750dhp2 (2.63+), Wxr18000be10p (5.03+), Wxr 1900dhp (2.53+); Wzr S900dhp is affected in all versions
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Determine router management interface exposureReview router firewall settings and WAN/Internet access configurations to confirm whether the web-based management interface is accessible from external networksAffected if The router administrative interface is reachable from the WAN/Internet or untrusted networks rather than only from the local LAN
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Inspect for unauthorized configuration changesReview router configuration settings, particularly administrator accounts, wireless security parameters, port forwarding rules, and DNS settings, comparing against known-good baseline configurationsAffected if Unexpected administrator accounts exist, wireless passwords have been changed without your knowledge, or unfamiliar port forwarding/DNS rules are present
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Check router logs for suspicious authentication activityAccess the router system logs or security logs and search for failed login attempts, successful logins from unexpected IP addresses, or configuration change events occurring without administrator actionAffected if Logs show successful administrative logins from unfamiliar IP addresses or configuration changes that were not performed by legitimate administrators
You are affected if you own a listed Buffalo router model running an older firmware version AND the router management interface is exposed to untrusted networks, or if you detect unauthorized changes to router configuration.
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.
dbcve · scoped1.012.532.63
Apply vendor-supplied firmware updates immediately; until patches are available, restrict network access to router management interfaces and monitor for unauthorized configuration changes.
Latest firmware version available from BUFFALO (specific fixed versions not disclosed in provided sources - for Wcr 1166dhpl use >=1.01, for Wsr3600be4 Kh use >=6.02, for Wsr3600be4p use >=5.02, for Wxr 1750dhp use >=2.63, for Wxr 1750dhp2 use >=2.63, for Wxr18000be10p use >=5.03, for Wxr 1900dhp us
- 1. Identify your BUFFALO router model from the affected product list (Wzr S900dhp, Wcr 1166dhpl, Wsr3600be4 Kh, Wsr3600be4p, Wxr 1750dhp, Wxr 1750dhp2, Wxr18000be10p, or Wxr 1900dhp)
- 2. Visit the official BUFFALO support website at www.buffalo.jp or jvn.jp to download the latest firmware version for your specific model
- 3. Access your router's web administration interface using a web browser
- 4. Navigate to the firmware update or administration section
- 5. Upload and apply the latest firmware version for your device
- 6. After the update completes, verify the new firmware version is installed
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-32678 — 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-2026-32678 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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