# CVE-2020-7561: Missing authorization in Easergy T300 with firmware 2.7 and older

> Attackers can execute commands, cause denial of service, or expose information due to missing authentication for critical functions in Easergy T300 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:** 19 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-7vr9-xc65-cx9c

## What is CVE-2020-7561?

CVE-2020-7561 is a critical missing authorization vulnerability in Easergy T300 with firmware 2.7 and older, published on 19 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A CWE-306: Missing Authentication for Critical Function vulnerability exists in Easergy T300 (with firmware 2.7 and older) that could cause a wide range of problems, including information exposure, denial of service, and command execution when access to a resource from an attacker is not restricted or incorrectly restricted.

Weakness: CWE-306 (Missing Authentication for Critical Functionality), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2020-7561?

It affects 1 product.


Products: Schneider-Electric Easergy T300 Firmware.

## How do I fix CVE-2020-7561?

No fix has been published for CVE-2020-7561 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7561 being exploited?

There is no known exploitation of CVE-2020-7561 in the wild and no public exploit code.

## Other vulnerabilities in Easergy T300 with firmware 2.7 and older

- [CVE-2020-28215](https://insights.sbomify.com/CVE-2020-28215/): Missing authorization in Easergy T300 (firmware 2.7 and older) (critical 9.8)
- [CVE-2020-7508](https://insights.sbomify.com/CVE-2020-7508/): Auth bypass in Easergy T300 (Firmware version 1.5.2 and older) (critical 9.8)
- [CVE-2020-7512](https://insights.sbomify.com/CVE-2020-7512/): Supply chain in Easergy T300 (Firmware version 1.5.2 and older) (critical 9.8)
- [CVE-2020-7503](https://insights.sbomify.com/CVE-2020-7503/): Cross-site request forgery in Easergy T300 (Firmware version 1.5.2 and older) (high 8.8)
- [CVE-2020-28216](https://insights.sbomify.com/CVE-2020-28216/): Information disclosure in Easergy T300 (firmware 2.7 and older) (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7561 and fix it if it is affected.

What it is: CVE-2020-7561 is a critical missing authorization vulnerability in Easergy T300 with firmware 2.7 and older, published on 19 Nov 2020. 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-2020-7561 in the wild and no public exploit code.

Affected product: Easergy T300 with firmware 2.7 and older. 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-2020-7561/ (Markdown: https://insights.sbomify.com/CVE-2020-7561/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7561
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7561
- OSV: https://osv.dev/vulnerability/CVE-2020-7561

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-7561/
Summaries are generated and may contain mistakes; the official description above is the record.