CVE-2024-40891

**UNSUPPORTED WHEN ASSIGNED** A post-authentication command injection vulnerability in the...

8.8 HighIn KEVPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

22.9%Up 22.8 points since Feb 5, 2025

What each source reports

CVE List Score used 8.8

Record: CVE-2024-40891
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-78
Updated: 2026-11-02

EUVDEUVD-2024-38851 8.8

Record: EUVD-2024-38851
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-pm4h-579g-cgqq 8.8

**UNSUPPORTED WHEN ASSIGNED** A post-authentication command injection vulnerability in the...

Record: GHSA-pm4h-579g-cgqq
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-78
Updated: 2026-11-02

CISA KEV No score

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.

Record: CVE-2024-40891
Weakness: CWE-78
Updated: 2026-11-02

NVD 8.8

Record: CVE-2024-40891
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-78
Updated: 2026-11-02

Affected products

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Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	Danyw24/zyxel-p870hn-hardware-hacking	2026-08-13
PoC in GitHub	krevetkqqq/CVE-2024-40891	2026-10-30

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-40891 is a high vulnerability (CVSS 8.8) in Zyxel Vmg4325-b10a Firmware, published February 4, 2025. CISA lists it as known to be exploited, since February 11, 2025. EUVD reports exploitation since February 11, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 22.9%, the 97th percentile. No source names a fixed version.