# CVE-2024-40891

**UNSUPPORTED WHEN ASSIGNED** A post-authentication command injection vulnerability in the management commands of the legacy DSL CPE Zyxel VMG4325-B10A firmware version 1.00(AAFR.4)C0_20170615 could allow an authenticated attacker to execute operating system (OS) commands on an affected device via Telnet.

- Page: https://www.vulneraibility.com/cve/CVE-2024-40891
- CVSS: 8.8
- Known exploited: yes, in CISA KEV since 2025-02-11; CISA due date 2025-03-04
- EPSS: 22.89%
- Unvetted proof-of-concept code on GitHub: 2 GitHub proofs of concept (first 2026-08-13)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-02-11)
- Weakness: CWE-78
- Published: 2025-02-04

## Affected versions

- Zyxel VMG4325-B10A firmware: affected <= 1.00

A version outside these ranges is not a statement that it is unaffected.

## References

- [advisory] 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
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-40891

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.