Vulnerability Monitor

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CVE-2021-35036


A cleartext storage of information vulnerability in the Zyxel VMG3625-T50B firmware version V5.50(ABTL.0)b2k could allow an authenticated attacker to obtain sensitive information from the configuration file.


Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 62 products from zyxel, from zyxel, from zyxel and 59 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2022-03-01T07:15:06.917

Last Modified

2024-11-21T06:11:43.343

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:S/C:P/I:N/A:N

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: SINGLE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

6.8

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-312
  • Type: Primary
    CWE-312

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System zyxel ax7501-b0_firmware < 5.17\(abpc.2\)c0 Yes
Hardware zyxel ax7501-b0 - No
Operating System zyxel dx3301-t0_firmware < 5.50\(abvy.3\)c0 Yes
Hardware zyxel dx3301-t0 - No
Operating System zyxel dx5401-b0_firmware < 5.17\(abyo.2\)c0 Yes
Hardware zyxel dx5401-b0 - No
Operating System zyxel emg3525-t50b_firmware < 5.50\(abpm.7\)c0 Yes
Hardware zyxel emg3525-t50b - No
Operating System zyxel emg5523-t50b_firmware < 5.50\(abpm.7\)c0 Yes
Hardware zyxel emg5523-t50b - No
Operating System zyxel emg5723-t50k_firmware < 5.50\(abom.8\)c0 Yes
Hardware zyxel emg5723-t50k - No
Operating System zyxel ep240p_firmware < 5.40\(abvh.0\)c0a03 Yes
Hardware zyxel ep240p - No
Operating System zyxel ex5401-b0_firmware < 5.17\(abyo.2\)c0 Yes
Hardware zyxel ex5401-b0 - No
Operating System zyxel ex5501-b0_firmware < 5.17\(abry.3\)c0 Yes
Hardware zyxel ex5501-b0 - No
Operating System zyxel lte3301-plus_firmware < 1.00\(abqu.6\)c0 Yes
Hardware zyxel lte3301-plus - No
Operating System zyxel lte5388-m804_firmware < 1.00\(abra.6\)c0 Yes
Hardware zyxel lte5388-m804 - No
Operating System zyxel lte5388-s905_firmware < 1.00\(abvi.6\)c0 Yes
Hardware zyxel lte5388-s905 - No
Operating System zyxel lte5398-m904_firmware < 1.00\(abqv.2\)c0 Yes
Hardware zyxel lte5398-m904 - No
Operating System zyxel lte7240-m403_firmware < 2.00\(abmg.6\)c0 Yes
Hardware zyxel lte7240-m403 - No
Operating System zyxel lte7461-m602_firmware < 2.00\(abqn.6\)c0 Yes
Hardware zyxel lte7461-m602 - No
Operating System zyxel lte7480-m804_firmware < 1.00\(abra.6\)c0 Yes
Hardware zyxel lte7480-m804 - No
Operating System zyxel lte7480-s905_firmware < 2.00\(abqt.6\)c0 Yes
Hardware zyxel lte7480-s905 - No
Operating System zyxel lte7485-s905_firmware < 1.00\(abvn.6\)c0 Yes
Hardware zyxel lte7485-s905 - No
Operating System zyxel lte7490-m804_firmware < v1.00\(abqy.5\)c0 Yes
Hardware zyxel lte7490-m804 - No
Operating System zyxel nr5101_firmware < 1.00\(abvc.6\)c0 Yes
Hardware zyxel nr5101 - No
Operating System zyxel nr7101_firmware < 1.00\(abuv.7\)c0 Yes
Hardware zyxel nr7101 - No
Operating System zyxel nr7102_firmware < 1.00\(abyd.2\)c0 Yes
Hardware zyxel nr7102 - No
Operating System zyxel pm7300-t0_firmware < 5.42\(acbc.1\)c0 Yes
Hardware zyxel pm7300-t0 - No
Operating System zyxel pmg5317-t20b_firmware < 5.40\(abki.4\)c0 Yes
Hardware zyxel pmg5317-t20b - No
Operating System zyxel pmg5617-t20b2_firmware < 5.41\(acbb.1\)c0 Yes
Hardware zyxel pmg5617-t20b2 - No
Operating System zyxel pmg5617ga_firmware < 5.40\(abna.2\)c0 Yes
Hardware zyxel pmg5617ga - No
Operating System zyxel pmg5622ga_firmware < 5.40\(abnb.2\)c0 Yes
Hardware zyxel pmg5622ga - No
Operating System zyxel vmg3625-t50b_firmware < 5.50\(abtl.0\)b2r Yes
Hardware zyxel vmg3625-t50b - No
Operating System zyxel vmg3927-t50k_firmware < 5.50\(abom.8\)c0 Yes
Hardware zyxel vmg3927-t50k - No
Operating System zyxel vmg8623-t50b_firmware < 5.50\(abpm.7\)c0 Yes
Hardware zyxel vmg8623-t50b - No
Operating System zyxel vmg8825-t50k_firmware < 5.50\(abom.8\)c0 Yes
Hardware zyxel vmg8825-t50k - No
Operating System zyxel vmg3625-t50b_firmware < 5.50\(accr.0\)b4 Yes
Hardware zyxel vmg3625-t50b - No
Operating System zyxel vmg3625-t50b_firmware < 5.50\(abpm.7\)c0 Yes
Hardware zyxel vmg3625-t50b - No

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For zyxel's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.