# CVE-2020-10866: Information disclosure in n/a

> Attackers can enumerate network interfaces and access points from a low-integrity process via the Avast Service RPC endpoint.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Apr 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-hcrc-4mmf-w8v9

## What is CVE-2020-10866?

CVE-2020-10866 is a high-severity vulnerability in n/a, published on 1 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Avast Antivirus before 20. The aswTask RPC endpoint for the TaskEx library in the Avast Service (AvastSvc.exe) allows attackers to enumerate the network interfaces and access points from a Low Integrity process via RPC.

Weakness: CWE-326 (Inadequate Encryption Strength)

## Which versions are affected by CVE-2020-10866?

It affects 1 product.


Products: Avast Antivirus.

## How do I fix CVE-2020-10866?

No fix has been published for CVE-2020-10866 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-10866 being exploited?

There is no known exploitation of CVE-2020-10866 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2025-13032](https://insights.sbomify.com/CVE-2025-13032/): Race condition in (Free/Inernet Security/Ultimate) Antivirus (critical 9.9)
- [CVE-2020-10867](https://insights.sbomify.com/CVE-2020-10867/): Security feature bypass in n/a (critical 9.8)
- [CVE-2017-8307](https://insights.sbomify.com/CVE-2017-8307/): Missing authorization in n/a (critical 9.8)
- [CVE-2025-3500](https://insights.sbomify.com/CVE-2025-3500/): Integer Overflow in Avast Antiviurs 25.1.981.6 on Windows may result in privilege escalation (critical 9.0)
- [CVE-2021-45335](https://insights.sbomify.com/CVE-2021-45335/): Missing authorization in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-10866 and fix it if it is affected.

What it is: CVE-2020-10866 is a high-severity vulnerability in n/a, published on 1 Apr 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-2020-10866 in the wild and no public exploit code.

Affected product: n/a. 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-2020-10866/ (Markdown: https://insights.sbomify.com/CVE-2020-10866/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-10866
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-10866
- OSV: https://osv.dev/vulnerability/CVE-2020-10866

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-10866/
Summaries are generated and may contain mistakes; the official description above is the record.