vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2024-40891

HIGH
8.8
CVSS Score
Published: February 4, 2025 at 10:02 AM UTC
Updated: June 17, 2026 at 07:46 AM UTC
27 products affected across 1 vendorVmg1312-b10a FirmwareVmg4380-b10a FirmwareVmg8924-b10a Firmware

Using VMG4325-B10A firmware by Zyxel?

Get instant alerts when new vulnerabilities affect VMG4325-B10A firmware - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH8.8
Exploitation
CISA KEV
Exploit prediction
EPSS 23%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score22.9%

EPSS (Exploit Prediction Scoring System) estimates a 22.9% chance this CVE is exploited in the wild within the next 30 days — higher than 98% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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.

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.
Ransomware Use
Unknown
Added to KEV
Feb 11, 2025
Remediation Due
Mar 4, 2025
601 days overdue
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-2024-40891

Description

**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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Sbg3300-n000 Firmware· Zyxel
95%
All versions
zyxel-sbg3300-n000 (same device)
Sbg3300-nb00 Firmware· Zyxel
95%
All versions
zyxel-sbg3300-nb00 (same device)
Sbg3500-n000 Firmware· Zyxel
95%
All versions
Sbg3500-nb00 Firmware· Zyxel
95%
All versions
zyxel-sbg3500-nb00 (same device)
Vmg1312-b10a Firmware· Zyxel
95%
All versions
zyxel-vmg1312-b10a (same device)
Vmg1312-b10b Firmware· Zyxel
95%
All versions
zyxel-vmg1312-b10b (same device)
Vmg1312-b10e Firmware· Zyxel
95%
All versions
zyxel-vmg1312-b10e (same device)
Vmg3312-b10a Firmware· Zyxel
95%
All versions
zyxel-vmg3312-b10a (same device)
Vmg3313-b10a Firmware· Zyxel
95%
All versions
zyxel-vmg3313-b10a (same device)
Vmg3926-b10b Firmware· Zyxel
95%
All versions
zyxel-vmg3926-b10b (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: [email protected]
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
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-40891

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHZyxel
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-78

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card