CVE-2023-33009 · netVigilance record NV23-0075
Zyxel Multiple Firewalls Buffer Overflow
past due
What to do
Apply updates per vendor instructions.
CISA deadline 2023-06-26 · passed 3 years 2 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL/USG firewalls contain a buffer overflow vulnerability in the notification function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on 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-120.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 3 years 2 months ago
Sources
- NVD entry for CVE-2023-33009 nvd.nist.gov/vuln/detail/CVE-2023-33009
- 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-multiple-buffer-overflow-vulnerabilities-of-firewalls
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2023-33009