Zyxel Multiple Firewalls Buffer Overflow Vulnerability (CVE-2023-33010)
Severity: critical · Patch status: patched · Since 2023-06-05 · CVE-2023-33010
Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL/USG firewalls contain a buffer overflow vulnerability in the ID processing function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device. CISA added CVE-2023-33010 to its Known Exploited Vulnerabilities catalog on Jun 5, 2023, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Jun 26, 2023 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
