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Vulnerability record · CVE-2021-35036 · published 1 March 2022

CVE-2021-35036: Zyxel ax7501-b0 firmware cleartext storage of sensitive data vulnerability

Zyxel · Ax7501 B0 Firmware

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.

6.5 CVSS 3.1 Medium EPSS 0.49% · top 59.3% CWE-312 · Cleartext storage of sensitive data
6.5CVSS 3.1 base score, v2 3.5
0.49%EPSS exploitation probability, 30 days
NoNot in CISA KEV
31Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

31 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-cleartext-storage-of-information Vendor Advisory
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-cleartext-storage-of-information Vendor Advisory

Track CVE-2021-35036 inside VULONE

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-7673Zyxel emg3525-t50b firmware classic buffer overflow vulnerabilityA buffer overflow vulnerability in the URL parser of the zhttpd web server in Zyxel VMG8825-T50K firmware versions prior to V5.50(ABOM.5)C0 could all…EPSS 0.59%9.8CVE-2023-28769Zyxel dx5401-b0 firmware classic buffer overflow vulnerabilityThe buffer overflow vulnerability in the library “libclinkc.so” of the web server “zhttpd” in Zyxel DX5401-B0 firmware versions prior to V5.17(ABYO.1…EPSS 5.4%8.8CVE-2025-13943Zyxel ex5601-t1 firmware os command injection vulnerabilityA post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.50(ABVY.7)…EPSS 1.5%8.8CVE-2025-8693Zyxel dm4200-b0 firmware os command injection vulnerabilityA post-authentication command injection vulnerability in the "priv" parameter of Zyxel DX3300-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could …EPSS 1.1%8.8CVE-2022-43390Zyxel lte7480-m804 firmware os command injection vulnerabilityA command injection vulnerability in the CGI program of Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an authenticated attacker t…EPSS 1.1%8.0CVE-2022-26413Zyxel vmg3312-t20a firmware os command injection vulnerabilityA command injection vulnerability in the CGI program of Zyxel VMG3312-T20A firmware version 5.30(ABFX.5)C0 could allow a local authenticated attacker…EPSS 0.70%7.5CVE-2025-6599Zyxel lte3301-plus firmware uncontrolled resource consumption vulnerabilityAn uncontrolled resource consumption vulnerability in the web server of Zyxel DX3301-T0 firmware version 5.50(ABVY.6.3)C0 and earlier could allow an …EPSS 0.31%7.5CVE-2024-8748Zyxel lte3301-plus firmware classic buffer overflow vulnerabilityA buffer overflow vulnerability in the packet parser of the third-party library "libclinkc" in Zyxel VMG8825-T50K firmware versions through V5.50(ABO…EPSS 0.52%

Source: NIST National Vulnerability Database (record CVE-2021-35036), CISA KEV, FIRST EPSS (scores of 2026-10-15). This page is refreshed as NVD updates the record.