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CVE-2024-40891

78
FAUCET Score

CVE-2024-40891 is a post-authentication command injection vulnerability affecting the Zyxel VMG4325-B10A DSL CPE device, specifically firmware version 1.00(AAFR.4)C0_20170615. An authenticated attacker can exploit this flaw via Telnet to execute arbitrary operating system commands on the device. This vulnerability carries a high CVSS score of 8.8, indicating a critical risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. The vendor has stated that the affected product is unsupported and will not receive a patch. CVE-2024-40891 is actively exploited in the wild, as confirmed by its inclusion in the KEV catalog and extensive media coverage. Despite no public Metasploit or Nuclei modules, the vulnerability has garnered significant community discussion, highlighting its active exploitation and the lack of a vendor-provided fix.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:zyxel:vmg1312-b10a_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:zyxel:vmg1312-b10b_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:zyxel:vmg1312-b10e_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:zyxel:vmg3312-b10a_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:zyxel:vmg3313-b10a_firmware:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
22.00%
Probability of exploitation in next 30 days
EPSS Percentile
97.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Feb 11, 2025
This CVE's current EPSS score of 0.2200 is in the 96th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

zyxelpatch availablevia llm_extracted
View patch
dockervendor investigatingvia llm_extracted
View patch

Vendor Advisories (2)

dockerllm-docker-bd51a99b756cb761

Zyxel security advisory for command injection and insecure default credentials vulnerabilities in certain legacy DSL CPE

Feb 4, 2025
zyxelllm-zyxel-9d5f31d8302e07b8

Zyxel security advisory for command injection and insecure default credentials vulnerabilities in certain legacy DSL CPE

Feb 4, 2025

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
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
Vendor Advisory