Coverage › CVE-2023-33009
CVE-2023-33009 Unmapped
Zyxel Multiple Firewalls Buffer Overflow Vulnerability
- Vendor / product
- Zyxel — Multiple Firewalls
- Description (CISA)
- 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.
- Added to KEV
- 2023-06-05
- Due date
- 2023-06-26
- Required action
- Apply updates per vendor instructions.
- Known ransomware use
- Unknown
- CWE
- CWE-120
- CISA notes
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls
https://nvd.nist.gov/vuln/detail/CVE-2023-33009 - Elsewhere
- cve.org · NVD · CISA KEV · JSON
ATT&CK techniques
No public source states how this vulnerability is exploited in ATT&CK terms.
The only authoritative CVE → ATT&CK mapping in the open — CTID's Mappings Explorer, pinned to a KEV snapshot of 2025-07-28 and ATT&CK 16.1 — does not include CVE-2023-33009. CISA's catalogue carries no technique field. kevmap does not infer techniques from the CWE (CWE-120) — here is why — and does not guess.
This page will change state automatically if a mapping is published. What is shown above is everything CISA publishes about the entry.