VULNERABILITY INTELLIGENCE

CVE-2021-21739

CVSS score4.6 MEDIUM
EPSS probability0.25%
CISA KEVNot currently listed
Published2021-08-05
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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>

Weakness classification

  • nvd@nist.gov: CWE-345

Primary references