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VULNERABILITIES

CVE-2020-13365 Details

Description

Certain Zyxel products have a locally accessible binary that allows a non-root user to generate a password for an undocumented user account that can be used for a TELNET session as root. This affects NAS520 V5.21(AASZ.4)C0, V5.21(AASZ.0)C0, V5.11(AASZ.3)C0, and V5.11(AASZ.0)C0; NAS542 V5.11(ABAG.0)C0, V5.20(ABAG.1)C0, and V5.21(ABAG.3)C0; NSA325 v2_V4.81(AALS.0)C0 and V4.81(AAAJ.1)C0; NSA310 4.22(AFK.0)C0 and 4.22(AFK.1)C0; NAS326 V5.21(AAZF.8)C0, V5.11(AAZF.4)C0, V5.11(AAZF.2)C0, and V5.11(AAZF.3)C0; NSA310S V4.75(AALH.2)C0; NSA320S V4.75(AANV.2)C0 and V4.75(AANV.1)C0; NSA221 V4.41(AFM.1)C0; and NAS540 V5.21(AATB.5)C0 and V5.21(AATB.3)C0.

Metrics

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://www.zyxel.com/support/Zyxel-security-advisory-for-NAS-remote-access-vulnerability.shtml CVEVendor Advisory
https://www.zyxel.com/us/en/support/security_advisories.shtml CVEVendor Advisory
https://www.zyxel.com/support/Zyxel-security-advisory-for-NAS-remote-access-vulnerability.shtml [email protected]Vendor Advisory
https://www.zyxel.com/us/en/support/security_advisories.shtml [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-287Improper Authentication[email protected]

Affected Products

ProductVersions

Change History

13 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2020-13365
NVD Published Date:
Aug 6, 2020
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2020-13365 Details - Not Deferred