CVE-2023-33009: Zyxel Multiple Firewalls Buffer Overflow Vulnerability
In CISA’s Known Exploited Vulnerabilities catalog: Zyxel Multiple Firewalls Buffer Overflow Vulnerability.
Added , federal remediation due . Known ransomware use: Unknown.
Required action: Apply updates per vendor instructions.
Description
A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.60 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.60 through 5.36 Patch 1, VPN series firmware versions 4.60 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.60 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · CWE-120
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
Zyxel: ATP series firmwareZyxel: USG20(W)-VPN firmwareZyxel: USG FLEX 50(W) firmwareZyxel: USG FLEX series firmwareZyxel: VPN series firmwareZyxel: ZyWALL/USG series firmware
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-mul… (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)