# CVE-2023-26588: Hardcoded credentials in BS-GSL and BS-GS series

> Hard-coded credentials in Buffalo network switches allow attackers to access debug functions, potentially exposing sensitive information or bypassing security controls.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Apr 2023
- **Updated:** 11 Feb 2025
- **Also known as:** GHSA-2f8j-4hf7-xq8c

## What is CVE-2023-26588?

CVE-2023-26588 is a high-severity vulnerability in BUFFALO INC. BS-GSL and BS-GS series, published on 11 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Use of hard-coded credentials vulnerability in Buffalo network devices allows an attacker to access the debug function of the product. The affected products and versions are as follows: BS-GSL2024 firmware Ver. 1.10-0.03 and earlier, BS-GSL2016P firmware Ver. 1.10-0.03 and earlier, BS-GSL2016 firmware Ver. 1.10-0.03 and earlier, BS-GS2008 firmware Ver. 1.0.10.01 and earlier, BS-GS2016 firmware Ver. 1.0.10.01 and earlier, BS-GS2024 firmware Ver. 1.0.10.01 and earlier, BS-GS2048 firmware Ver. 1.0.10.01 and earlier, BS-GS2008P firmware Ver. 1.0.10.01 and earlier, BS-GS2016P firmware Ver. 1.0.10.01 and earlier, and BS-GS2024P firmware Ver. 1.0.10.01 and earlier

Weakness: CWE-668 (Exposure of Resource to Wrong Sphere)

## Which versions are affected by CVE-2023-26588?

It affects 16 products.


Products: Buffalo Bs-Gs2008 Firmware, Buffalo Bs-Gs2008p Firmware, Buffalo Bs-Gs2016 Firmware, Buffalo Bs-Gs2016hp Firmware, Buffalo Bs-Gs2016p Firmware, Buffalo Bs-Gs2024 Firmware, Buffalo Bs-Gs2024hp Firmware, Buffalo Bs-Gs2024p Firmware, Buffalo Bs-Gs2048 Firmware, Buffalo Bs-Gsl2005 Firmware, Buffalo Bs-Gsl2005p Firmware, Buffalo Bs-Gsl2008 Firmware, Buffalo Bs-Gsl2008p Firmware, Buffalo Bs-Gsl2016 Firmware, Buffalo Bs-Gsl2016p Firmware, Buffalo Bs-Gsl2024 Firmware.

## How do I fix CVE-2023-26588?

No fix has been published for CVE-2023-26588 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-26588 being exploited?

There is no known exploitation of CVE-2023-26588 in the wild and no public exploit code.

## Other vulnerabilities in BUFFALO INC. BS-GSL and BS-GS series

- [CVE-2023-24544](https://insights.sbomify.com/CVE-2023-24544/): Missing authorization in BS-GSL and BS-GS series (high 8.1)
- [CVE-2023-24464](https://insights.sbomify.com/CVE-2023-24464/): Cross-site scripting in BS-GS series (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-26588 and fix it if it is affected.

What it is: CVE-2023-26588 is a high-severity vulnerability in BUFFALO INC. BS-GSL and BS-GS series, published on 11 Apr 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-2023-26588 in the wild and no public exploit code.

Affected product: BUFFALO INC. BS-GSL and BS-GS series. 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-2023-26588/ (Markdown: https://insights.sbomify.com/CVE-2023-26588/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-26588
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-26588
- OSV: https://osv.dev/vulnerability/CVE-2023-26588

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-26588/
Summaries are generated and may contain mistakes; the official description above is the record.