CVE-2023-28771 · netVigilance record NV23-0073
Zyxel Multiple Firewalls OS Command Injection
past due
What to do
Apply updates per vendor instructions.
CISA deadline 2023-06-21 · passed 3 years 2 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
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.
Who is affected
Zyxel Multiple Firewalls. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-78.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 3 years 2 months ago
Sources
- NVD entry for CVE-2023-28771 nvd.nist.gov/vuln/detail/CVE-2023-28771
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- zyxel.com www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2023-28771