CVE-2021-21739

MediumCVSS 4.6/10Last modified Jun 17, 2026

Description

A ZTE's product of the transport network access layer has a security vulnerability. Because the system does not sufficiently verify the data reliability, attackers could replace an authenticated optical module on the equipment with an unauthenticated one, bypassing system authentication and detection, thus affecting signal transmission. This affects: <ZXCTN 6120H><V5.10.00B24>

Metrics

CVSS 3.1 4.6/10CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-345

Affected software

No affected versions have been published.

Timeline

Published: Aug 5, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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