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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (9.88%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 9.88% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-78
- Affected
- zyxel/usg 20w-vpn firmware · zyxel/usg 2200-vpn firmware · zyxel/usg flex 100 firmware · zyxel/usg flex 100w firmware · zyxel/usg flex 200 firmware · zyxel/usg flex 50 firmware · zyxel/usg flex 500 firmware · zyxel/usg flex 50w firmware · zyxel/usg flex 700 firmware · zyxel/zywall atp100 firmware · zyxel/zywall atp100w firmware · zyxel/zywall atp200 firmware · zyxel/zywall atp500 firmware · zyxel/zywall atp700 firmware · zyxel/zywall atp800 firmware · zyxel/zywall vpn100 firmware · zyxel/zywall vpn2s firmware · zyxel/zywall vpn300 firmware · zyxel/zywall vpn50 firmware · zyxel/zywall vpn 100 firmware · +2 more
- Source
- security@zyxel.com.tw
EPSS 9.9% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllersVendor Advisory
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllersVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.