RCE in Zyxel Atp Series Firmware
CVE-2023-33012
A command injection vulnerability in the configuration parser of the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2, USG FLEX series firmware versions 5.00 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 5.10 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 5.10 through 5.36 Patch 2, and VPN series firmware versions 5.00 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands by using a crafted GRE configuration when the cloud management mode is enabled.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.099 (95.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Zyxel Atp Series Firmware — versions 5.10 through 5.36 Patch 2
- Zyxel Usg_20w-vpn
- Zyxel Usg_20w-vpn_firmware
- Zyxel Usg20(w)-vpn Series Firmware — versions 5.10 through 5.36 Patch 2
- Zyxel Usg_2200-vpn
- Zyxel Usg_2200-vpn_firmware
- Zyxel Usg_flex_100
- Zyxel Usg_flex_100_firmware
- Zyxel Usg_flex_100w
- Zyxel Usg_flex_100w_firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@zyxel.com.tw (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-33012?
- CVE-2023-33012 is a high-severity vulnerability in Zyxel Atp Series Firmware, classified under OS Command Injection. CVSS score: 8.8/10. Published 2023-07-17.
- How severe is CVE-2023-33012?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2023-33012 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.