CVE-2024-40891
Zyxel · published 2025-02-04
Source record Collected from the National Vulnerability Database (NVD)
CISA Known Exploited Vulnerabilities
CISA lists this CVE as known exploited (added 2025-02-11).
- CISA's name for it: Zyxel DSL CPE OS Command Injection Vulnerability
- CISA's description: 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.
- Known ransomware campaign use, per CISA: Unknown
- CISA states: The impacted product could be end-of-life (EoL) and/or end-of-service (EoS).
Source: CISA KEV catalog (CC0 1.0).
Description
Description by Zyxel Corporation via the CVE Program.
**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.
Status at the source
- NVD status: Analyzed
- CVE tag (from Zyxel Corporation): unsupported-when-assigned
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | VMG4325-B10A firmware | <= 1.00(AAFR.4)C0_20170615: affected |
Products named in NVD's CPE match criteria (14)
cpe:2.3:o:zyxel:vmg1312-b10a_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vmg1312-b10b_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vmg1312-b10e_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vmg3312-b10a_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vmg3313-b10a_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vmg3926-b10b_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vmg4325-b10a_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vmg4380-b10a_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vmg8324-b10a_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vmg8924-b10a_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:sbg3300-n000_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:sbg3300-nb00_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:sbg3500-n000_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:zyxel:sbg3500-nb00_firmware:-:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 8.8 HIGH — as published by Zyxel Corporation (Secondary)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: active · Automatable: no · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- 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.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-40891
Source dates: published 2025-02-04, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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