CVE-2024-40891: Zyxel DSL CPE OS Command Injection Vulnerability

Multiple Zyxel DSL CPE devices contain a post-authentication command injection vulnerability in the management commands that could allow an authenticated attacker to execute OS commands via Telnet.

VendorZyxel
ProductDSL CPE Devices
Date added to KEV2025-02-11
Due date (BOD 22-01)2025-03-04
Known ransomware campaign useUnknown
CWECWE-78
Required actionThe 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.

What to do

  1. Identify every instance of Zyxel DSL CPE Devices in your environment (asset inventory, EDR, vulnerability scanner).
  2. Apply CISA's required action: 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.
  3. Federal civilian agencies must act by 2025-03-04 under BOD 22-01; other organizations can use the same date as a target.
  4. Check the vendor advisory and NVD entry linked below for affected versions, then record the fix in your change log.

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Sources

Generated from the CISA feed with AI assistance; facts are taken verbatim from the feed. Not affiliated with or endorsed by CISA. Facts come from the CISA Known Exploited Vulnerabilities catalog (public domain).