# CVE-2021-47780: Macro Expert 4.7 - Unquoted Service Path

> Local attackers can execute arbitrary code with elevated privileges by exploiting an unquoted service path in Macro Expert.

- **Severity:** High 8.5 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jan 2026
- **Updated:** 5 Mar 2026
- **Also known as:** GHSA-mq6j-m5v8-2rmr

## What is CVE-2021-47780?

CVE-2021-47780 is a high-severity vulnerability in Macro-Expert Macro Expert, published on 15 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Macro Expert 4.7 contains an unquoted service path vulnerability that allows local users to potentially execute arbitrary code with elevated system privileges. Attackers can exploit the improperly configured service path to inject malicious executables that will be run with LocalSystem permissions during service startup.

Weakness: CWE-428 (Unquoted Search Path or Element)

## Which versions are affected by CVE-2021-47780?

It affects 1 product.


Products: Macro-Expert Macro Expert.

## How do I fix CVE-2021-47780?

No fix has been published for CVE-2021-47780 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47780 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47780 exists.

## Other vulnerabilities in Macro-Expert Macro Expert

- [CVE-2024-27674](https://insights.sbomify.com/CVE-2024-27674/): Privilege escalation in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47780 and fix it if it is affected.

What it is: CVE-2021-47780 is a high-severity vulnerability in Macro-Expert Macro Expert, published on 15 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47780 exists.

Affected product: Macro-Expert Macro Expert. 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-2021-47780/ (Markdown: https://insights.sbomify.com/CVE-2021-47780/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47780
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47780
- OSV: https://osv.dev/vulnerability/CVE-2021-47780

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-47780/
Summaries are generated and may contain mistakes; the official description above is the record.