Zyxel DSL CPE Devices
YES - ON THE CISA KEV LIST
CVE-2024-40890
Zyxel DSL CPE OS Command Injection Vulnerability
overdue since 2025-03-04
Zyxel: 13 entries (0.7% of all KEV entries are from this vendor); 1 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
Multiple Zyxel DSL CPE devices contain a post-authentication command injection vulnerability in the CGI program that could allow an authenticated attacker to execute OS commands via a crafted HTTP request.
Required action (CISA)
The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization if a current mitigation is unavailable.
Notes
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-insecure-default-credentials-vulnerabilities-in-certain-legacy-dsl-cpe-02-04-2025 ; https://www.zyxel.com/service-provider/global/en/security-advisories/zyxel-security-advisory-command-injection-insecure-in-certain-legacy-dsl-cpe-02-04-2025 ; https://nvd.nist.gov/vuln/detail/CVE-2024-40890
References
Other KEV entries for this vendor: Zyxel
- CVE-2026-7273 - GS1900 Series Switches (2026-09-21)
- CVE-2024-40891 - DSL CPE Devices (2025-02-11)
- CVE-2024-11667 - Multiple Firewalls (2024-12-03)
- CVE-2017-6884 - EMG2926 Routers (2023-09-18)
- CVE-2017-18368 - P660HN-T1A Routers (2023-08-07)
- CVE-2023-27992 - Multiple Network-Attached Storage (NAS) Devices (2023-06-23)
- CVE-2023-33009 - Multiple Firewalls (2023-06-05)
- CVE-2023-33010 - Multiple Firewalls (2023-06-05)
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