Vulnerability · CVE-2024-40891
Zyxel DSL CPE OS Command Injection Vulnerability
Published Jan 28, 2025 · catalog updated Jun 17, 2026 · Zyxel DSL CPE Devices
Patch now
CVE-2024-40891 is in the CISA known-exploited catalog, due Mar 4, 2025. Confirm Zyxel DSL CPE Devices against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- Severity
- High8.8
- Known exploitation
- CISA KEV and VulnCheck KEV
- EPSS
- 21.70%
- Remediation
- Remediation guidance
- Affected products
- cpe zyxel/sbg3300-n000 firmware · cpe zyxel/sbg3300-nb00 firmware · cpe zyxel/vmg1312-b10a firmware · cpe zyxel/vmg1312-b10b firmware · cpe zyxel/vmg1312-b10e firmware · cpe zyxel/vmg3312-b10a firmware
**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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe zyxel/sbg3300-n000 firmwareversion unspecified
- cpe zyxel/sbg3300-nb00 firmwareversion unspecified
- cpe zyxel/vmg1312-b10a firmwareversion unspecified
- cpe zyxel/vmg1312-b10b firmwareversion unspecified
- cpe zyxel/vmg1312-b10e firmwareversion unspecified
- cpe zyxel/vmg3312-b10a firmwareversion unspecified
- cpe zyxel/vmg3313-b10a firmwareversion unspecified
- cpe zyxel/vmg3926-b10b firmwareversion unspecified
- cpe zyxel/vmg4325-b10a firmwareversion unspecified
- cpe zyxel/vmg4380-b10a firmwareversion unspecified
- cpe zyxel/vmg8324-b10a firmwareversion unspecified
- cpe zyxel/vmg8924-b10a firmwareversion unspecified
- vendor Zyxel DSL CPE Devicesversion unspecified
How to fix CVE-2024-40891
Recommended remediation
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. CISA due date Mar 4, 2025.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2024-40891 is in the CISA known-exploited catalog, due Mar 4, 2025. Confirm Zyxel DSL CPE Devices against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Which versions are affected?
Affected version ranges are not on this record. 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.
What should an analyst verify?
CWE-78: OS Command Injection. EPSS 21.70%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Feb 4, 2025 · Catalog
Detected
**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.
Feb 11, 2025 · CISA KEV
Known exploited
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.
Mar 4, 2025 · CISA KEV
Remediation due
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.
Jun 17, 2026 · Catalog
Updated
**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.
Sources
- CISA KEVConfirmed exploitationCVE-2024-40891
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.
cisa.gov - CVE.orgVulnerability recordCVE-2024-40891
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2024-40891
30-day exploitation probability 21.7%
first.org - NIST NVDVulnerability recordCVE-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 a
nvd.nist.gov - VulnCheck KEVConfirmed exploitationCVE-2024-40891
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.
vulncheck.com
References
Freshness
Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.