# CVE-2020-7548: Weak cryptography in Smartlink, PowerTag, and Wiser Series Gateways (see security notification for version information)

> Insufficiently random values in Smartlink, PowerTag, and Wiser Gateways allow unauthorized users to bypass authentication and log in.

- **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:** 1 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-hg3w-24rp-mf42

## What is CVE-2020-7548?

CVE-2020-7548 is a critical vulnerability in Smartlink, PowerTag, and Wiser Series Gateways (see security notification for version information), published on 1 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A CWE-330 - Use of Insufficiently Random Values vulnerability exists in Smartlink, PowerTag, and Wiser Series Gateways (see security notification for version information) that could allow unauthorized users to login.

Weakness: CWE-330 (Use of Insufficiently Random Values)

## Which versions are affected by CVE-2020-7548?

It affects 7 products.


Products: Schneider-Electric Acti9 Powertag Link Firmware, Schneider-Electric Acti9 Powertag Link Hd Firmware, Schneider-Electric Acti9 Smartlink El B Firmware, Schneider-Electric Acti9 Smartlink Si B Firmware, Schneider-Electric Acti9 Smartlink Si D Firmware, Schneider-Electric Wiser Energy Firmware, Schneider-Electric Wiser Link Firmware.

## How do I fix CVE-2020-7548?

No fix has been published for CVE-2020-7548 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7548 being exploited?

There is no known exploitation of CVE-2020-7548 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7548 and fix it if it is affected.

What it is: CVE-2020-7548 is a critical vulnerability in Smartlink, PowerTag, and Wiser Series Gateways (see security notification for version information), published on 1 Dec 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-2020-7548 in the wild and no public exploit code.

Affected product: Smartlink, PowerTag, and Wiser Series Gateways (see security notification for version information). 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-2020-7548/ (Markdown: https://insights.sbomify.com/CVE-2020-7548/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7548
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7548
- OSV: https://osv.dev/vulnerability/CVE-2020-7548

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-7548/
Summaries are generated and may contain mistakes; the official description above is the record.