# CVE-2020-27266: Auth bypass in SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A

> Physically proximate attackers can bypass user authentication in SOOIL insulin pump mobile apps via Bluetooth Low Energy.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Jan 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-4v4q-53h2-r6mj

## What is CVE-2020-27266?

CVE-2020-27266 is a medium-severity authentication bypass vulnerability in SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A, published on 19 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A, a client-side control vulnerability in the insulin pump and its AnyDana-i and AnyDana-A mobile applications allows physically proximate attackers to bypass user authentication checks via Bluetooth Low Energy.

Weakness: CWE-287 (Improper Authentication), CWE-603 (Use of Client-Side Authentication)

## Which versions are affected by CVE-2020-27266?

It affects 3 products.


Products: Sooil Anydana-a Firmware, Sooil Anydana-I Firmware, Sooil Diabecare Rs Firmware.

## How do I fix CVE-2020-27266?

No fix has been published for CVE-2020-27266 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-27266 being exploited?

There is no known exploitation of CVE-2020-27266 in the wild and no public exploit code.

## Other vulnerabilities in SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A

- [CVE-2020-27264](https://insights.sbomify.com/CVE-2020-27264/): Weak cryptography in SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A (high 8.8)
- [CVE-2020-27256](https://insights.sbomify.com/CVE-2020-27256/): Hardcoded credentials in SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A (medium 6.8)
- [CVE-2020-27268](https://insights.sbomify.com/CVE-2020-27268/): Security feature bypass in SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A (medium 6.5)
- [CVE-2020-27269](https://insights.sbomify.com/CVE-2020-27269/): Other in SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A (medium 5.7)
- [CVE-2020-27270](https://insights.sbomify.com/CVE-2020-27270/): Weak cryptography in SOOIL Developments CoLtd DiabecareRS,AnyDana-i,AnyDana-A (medium 5.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-27266 and fix it if it is affected.

What it is: CVE-2020-27266 is a medium-severity authentication bypass vulnerability in SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A, published on 19 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-27266 in the wild and no public exploit code.

Affected product: SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A. 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-2020-27266/ (Markdown: https://insights.sbomify.com/CVE-2020-27266/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-27266
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-27266
- OSV: https://osv.dev/vulnerability/CVE-2020-27266

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-27266/
Summaries are generated and may contain mistakes; the official description above is the record.