# CVE-2023-27388: Auth bypass in T&D Corporation and ESPEC MIC CORP. data logger products

> Remote unauthenticated attackers can bypass authentication to log in as registered users on T&D and ESPEC data logger devices.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 May 2023
- **Updated:** 31 Jan 2025
- **Also known as:** GHSA-h3jh-74f5-29gh

## What is CVE-2023-27388?

CVE-2023-27388 is a critical authentication bypass vulnerability in T&D Corporation and ESPEC MIC CORP. data logger products, published on 23 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper 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).

Weakness: CWE-287 (Improper Authentication), CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2023-27388?

It affects 10 products.


Products: Especmic Rs-12n Firmware, Especmic Rt-12n Firmware, Especmic Rt-22bn Firmware, Especmic Teu-12n Firmware, Tandd Rtr-5w Firmware, Tandd Tr-71w Firmware, Tandd Tr-72w Firmware, Tandd Wdr-3 Firmware, Tandd Wdr-7 Firmware, Tandd Ws-2 Firmware.

## How do I fix CVE-2023-27388?

No fix has been published for CVE-2023-27388 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-27388 being exploited?

There is no known exploitation of CVE-2023-27388 in the wild and no public exploit code.

## Other vulnerabilities in T&D Corporation and ESPEC MIC CORP. data logger products

- [CVE-2023-27387](https://insights.sbomify.com/CVE-2023-27387/): Cross-site request forgery in T&D Corporation and ESPEC MIC CORP. data logger products (high 8.8)
- [CVE-2023-22654](https://insights.sbomify.com/CVE-2023-22654/): Cross-site scripting in T&D Corporation and ESPEC MIC CORP. data logger products (medium 5.4)
- [CVE-2023-23545](https://insights.sbomify.com/CVE-2023-23545/): Missing authorization in T&D Corporation and ESPEC MIC CORP. data logger products (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-27388 and fix it if it is affected.

What it is: CVE-2023-27388 is a critical authentication bypass vulnerability in T&D Corporation and ESPEC MIC CORP. data logger products, published on 23 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-27388 in the wild and no public exploit code.

Affected product: T&D Corporation and ESPEC MIC CORP. data logger products. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-27388/ (Markdown: https://insights.sbomify.com/CVE-2023-27388/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-27388
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-27388
- OSV: https://osv.dev/vulnerability/CVE-2023-27388

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-27388/
Summaries are generated and may contain mistakes; the official description above is the record.