RCE in Zyxel Atp100
CVE-2024-42057
A command injection vulnerability in the IPSec VPN feature of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V4.16 through V5.38, and USG20(W)-VPN series firmware versions from V4.16 through V5.38 could allow an unauthenticated attacker to execute some OS commands on an affected device by sending a crafted username to the vulnerable device. Note that this attack could be successful only if the device was configured in User-Based-PSK authentication mode and a valid user with a long username exceeding 28 characters exists.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.013 (68.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Zyxel Atp100
- Zyxel Atp100w
- Zyxel Atp200
- Zyxel Atp500
- Zyxel Atp700
- Zyxel Atp800
- Zyxel Atp Series Firmware — versions versions V4.32 through V5.38
- Zyxel Usg_20w-vpn
- Zyxel Usg20(w)-vpn Series Firmware — versions versions V4.16 through V5.38
- Zyxel Usg_flex_100
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@zyxel.com.tw (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2024-42057?
- CVE-2024-42057 is a high-severity vulnerability in Zyxel Atp100, classified under OS Command Injection. CVSS score: 8.1/10. Published 2024-09-03.
- How severe is CVE-2024-42057?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2024-42057 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.