# CVE-2020-5773: Privilege escalation in Teltonika Gateway TRB245

> A low-privileged user can perform unauthorized write operations on Teltonika TRB245 gateways due to improper access control.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Aug 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-f6wr-qrpc-cgq3

## What is CVE-2020-5773?

CVE-2020-5773 is a high-severity vulnerability in Teltonika Gateway TRB245, published on 3 Aug 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Improper Access Control in Teltonika firmware TRB2_R_00.02.04.01 allows a low privileged user to perform unauthorized write operations.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2020-5773?

It affects 1 product.


Products: Teltonika-Networks Trb245 Firmware.

## How do I fix CVE-2020-5773?

No fix has been published for CVE-2020-5773 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-5773 being exploited?

There is no known exploitation of CVE-2020-5773 in the wild and no public exploit code.

## Other vulnerabilities in Teltonika Gateway TRB245

- [CVE-2020-5786](https://insights.sbomify.com/CVE-2020-5786/): Cross-site request forgery in Teltonika Gateway TRB245 (high 8.8)
- [CVE-2020-5770](https://insights.sbomify.com/CVE-2020-5770/): Cross-site request forgery in Teltonika Gateway TRB245 (high 8.8)
- [CVE-2020-5771](https://insights.sbomify.com/CVE-2020-5771/): Privilege escalation in Teltonika Gateway TRB245 (high 7.5)
- [CVE-2020-5772](https://insights.sbomify.com/CVE-2020-5772/): File upload in Teltonika Gateway TRB245 (high 7.5)
- [CVE-2020-5784](https://insights.sbomify.com/CVE-2020-5784/): Server-side request forgery in Teltonika Gateway TRB245 (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-5773 and fix it if it is affected.

What it is: CVE-2020-5773 is a high-severity vulnerability in Teltonika Gateway TRB245, published on 3 Aug 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-5773 in the wild and no public exploit code.

Affected product: Teltonika Gateway TRB245. 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-2020-5773/ (Markdown: https://insights.sbomify.com/CVE-2020-5773/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-5773
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-5773
- OSV: https://osv.dev/vulnerability/CVE-2020-5773

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-5773/
Summaries are generated and may contain mistakes; the official description above is the record.