CVE-2023-27388
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 · uneditedImproper authentication vulnerability in T&D Corporation and ESPEC MIC CORP. data logger products allows a remote unauthenticated attacker to login to the product as a registered user. Affected products and versions are as follows: T&D Corporation data logger products (TR-71W/72W all firmware versions, RTR-5W all firmware versions, WDR-7 all firmware versions, WDR-3 all firmware versions, and WS-2 all firmware versions), and ESPEC MIC CORP. data logger products (RT-12N/RS-12N all firmware versions, RT-22BN all firmware versions, and TEU-12N all firmware versions).
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 confidenceThis is an authentication bypass vulnerability where a remote unauthenticated attacker can log in to affected T&D and ESPEC MIC data logger products as any registered user. The flaw allows complete impersonation of legitimate users without credentials, granting access to sensitive environmental monitoring data and device controls.
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 versionsall versionsall versionsall versionsall versionsall versionsall versionsall versionsCVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 modelAccess the device web interface or check the device label/physical inspection. Look for model numbers: Tr 71w, Tr 72w, Rtr 5w, Wdr 7, Wdr 3, Ws 2, Rt 12n, or Rs 12n. The web interface typically displays device information on the status or settings page.Affected if The device model is any of: Tr 71w, Tr 72w, Rtr 5w, Wdr 7, Wdr 3, Ws 2, Rt 12n, or Rs 12n from T&D or ESPEC MIC.
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Verify the web interface is network-accessibleAttempt to access the device web interface from a remote system by entering the device IP address in a web browser. Check if the login page loads without requiring authentication.Affected if The device web interface is accessible over the network without prior authentication.
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Confirm firmware versionLog into the device web interface and navigate to the firmware version or system information page. All firmware versions of the affected models are vulnerable.Affected if The device is one of the affected models regardless of firmware version.
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Test authentication bypassOn the login page, enter any registered username (such as an existing user account known from the system) with an arbitrary password. Attempt to submit the login form and observe if access is granted without valid credentials.Affected if Login succeeds with any username regardless of password validity, indicating the authentication bypass is present.
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Check network exposureReview firewall rules, router configurations, or VPN settings to determine if the device web interface is exposed to the internet or untrusted networks. Use external port scanning tools to confirm if HTTP/HTTPS ports are reachable from outside the local network.Affected if The device web interface (ports 80/443 or custom HTTP ports) is reachable from untrusted networks or the internet.
If the device is any of the T&D or ESPEC MIC models listed (Tr 71w, Tr 72w, Rtr 5w, Wdr 7, Wdr 3, Ws 2, Rt 12n, Rs 12n) and its web interface is network-accessible, the environment is affected by this authentication bypass 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 dataSince vendor-supplied patches are unavailable for all firmware versions, implement compensating controls including network isolation through firewalls/VPNs, restricting device access to authorized networks, and consider device replacement if network-based mitigation is insufficient.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-27388 — 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-2023-27388 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
- No spam, self-promotion, credentials, or personal data