# CVE-2021-35534: Insufficient Security Control Vulnerability

> Authenticated attackers can bypass security controls to modify data or firmware and permanently disable Hitachi Energy Relion devices.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Nov 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-72pf-j5fj-gg32

## What is CVE-2021-35534?

CVE-2021-35534 is a high-severity missing authorization vulnerability in Hitachi Energy GMS600, published on 18 Nov 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Insufficient security control vulnerability in internal database access mechanism of Hitachi Energy Relion 670/650/SAM600-IO, Relion 650, GMS600, PWC600 allows attacker who successfully exploited this vulnerability, of which the product does not sufficiently restrict access to an internal database tables, could allow anybody with user credentials to bypass security controls that is enforced by the product. Consequently, exploitation may lead to unauthorized modifications on data/firmware, and/or to permanently disabling the product. This issue affects: Hitachi Energy Relion 670 Series 2.0 all revisions; 2.2.2 all revisions; 2.2.3 versions prior to 2.2.3.5. Hitachi Energy Relion 670/650 Series 2.1 all revisions. 2.2.0 all revisions; 2.2.4 all revisions; Hitachi Energy Relion 670/650/SAM600-IO 2.2.1 all revisions; 2.2.5 versions prior to 2.2.5.2. Hitachi Energy Relion 650 1.0 all revisions. 1.1 all revisions; 1.2 all revisions; 1.3 versions prior to 1.3.0.8; Hitachi Energy GMS600 1.3.0; 1.3.0.1; 1.2.0. Hitachi Energy PWC600 1.0.1 version 1.0.1.4 and prior versions; 1.1.0 version 1.1.0.1 and prior versions.

Weakness: CWE-269 (Improper Privilege Management), CWE-274 (Improper Handling of Insufficient Privileges)

## Which versions are affected by CVE-2021-35534?

It affects 5 products.


Products: Hitachienergy Gms600 Firmware, Hitachienergy Pwc600 Firmware, Hitachienergy Relion 650 Firmware, Hitachienergy Relion 670 Firmware, Hitachienergy Relion Sam600-Io Firmware.

## How do I fix CVE-2021-35534?

No fix has been published for CVE-2021-35534 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-35534 being exploited?

There is no known exploitation of CVE-2021-35534 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-35534 and fix it if it is affected.

What it is: CVE-2021-35534 is a high-severity missing authorization vulnerability in Hitachi Energy GMS600, published on 18 Nov 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-35534 in the wild and no public exploit code.

Affected product: Hitachi Energy GMS600. 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-2021-35534/ (Markdown: https://insights.sbomify.com/CVE-2021-35534/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35534
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35534
- OSV: https://osv.dev/vulnerability/CVE-2021-35534

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-35534/
Summaries are generated and may contain mistakes; the official description above is the record.