Risk Letters

Exploited vulnerability

CVE-2023-33010

TLP:CLEAR

Zyxel Multiple Firewalls Buffer Overflow Vulnerability

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.

Facts

  • Vendor: Zyxel
  • Product: Multiple Firewalls
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 29 %
  • On CISA's Known Exploited Vulnerabilities list since: 5 June 2023
  • First known exploitation: 5 June 2023
  • CISA's deadline for US federal agencies: 26 June 2023
  • Weakness: CWE-120
  • First seen by Risk Letters: 5 June 2023

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD