Zyxel Usg20-vpn Firmware — known CVE vulnerabilities

Every CVE whose affected-product data names Zyxel Usg20-vpn Firmware, ordered by CVSS severity, with EPSS exploit prediction and CISA KEV status.

CVEs (15)

• CVE-2023-33009 — CVSS 9.8 (critical) — actively exploited: A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX…
• CVE-2023-33010 — CVSS 9.8 (critical) — actively exploited: A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX…
• CVE-2020-9054 — CVSS 9.8 (critical) — actively exploited: Multiple ZyXEL network-attached storage (NAS) devices running firmware version 5.21 contain a pre-authentication command injection…
• CVE-2021-35029 — CVSS 9.8 (critical): An authentication bypasss vulnerability in the web-based management interface of Zyxel USG/Zywall series firmware versions 4.35 through…
• CVE-2020-29583 — CVSS 9.8 (critical) — actively exploited: Firmware version 4.60 of Zyxel USG devices contains an undocumented account (zyfwp) with an unchangeable password. The password for this…
• CVE-2023-27991 — CVSS 8.8 (high): The post-authentication command injection vulnerability in the CLI command of Zyxel ATP series firmware versions 4.32 through 5.35, USG…
• CVE-2023-6764 — CVSS 8.1 (high): A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1…
• CVE-2022-30526 — CVSS 7.8 (high): A privilege escalation vulnerability was identified in the CLI command of Zyxel USG FLEX 100(W) firmware versions 4.50 through 5.30, USG…
• CVE-2022-38547 — CVSS 7.2 (high): A post-authentication command injection vulnerability in the CLI command of Zyxel ZyWALL/USG series firmware versions 4.20 through 4.72…
• CVE-2023-6398 — CVSS 7.2 (high): A post-authentication command injection vulnerability in the file upload binary in Zyxel ATP series firmware versions from 4.32 through…
• CVE-2023-22918 — CVSS 6.5 (medium): A post-authentication information exposure vulnerability in the CGI program of Zyxel ATP series firmware versions 4.32 through 5.35, USG…
• CVE-2022-2030 — CVSS 6.5 (medium): A directory traversal vulnerability caused by specific character sequences within an improperly sanitized URL was identified in some CGI…
• CVE-2019-9955 — CVSS 6.1 (medium): On Zyxel ATP200, ATP500, ATP800, USG20-VPN, USG20W-VPN, USG40, USG40W, USG60, USG60W, USG110, USG210, USG310, USG1100, USG1900…
• CVE-2023-6399 — CVSS 5.7 (medium): A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from…
• CVE-2023-27990 — CVSS 4.8 (medium): The cross-site scripting (XSS) vulnerability in Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions…