# CVE-2023-28771: A Zyxel Multiple Firewalls bug is being used in attacks

Status: Being used now (CISA KEV, added 2023-05-31)
Who: 
Do this: 

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Zyxel Multiple Firewalls (CVE-2023-28771) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2023-28771. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.

## Official description
Zyxel ATP, USG FLEX, VPN, and ZyWALL/USG firewalls allow for improper error message handling which could allow an unauthenticated attacker to execute OS commands remotely by sending crafted packets to an affected device.

## Sources
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls
- https://nvd.nist.gov/vuln/detail/CVE-2023-28771
- https://nvd.nist.gov/vuln/detail/CVE-2023-28771

Generated by isitexploited.org from public sources. Verify version numbers against the vendor before acting.