// For flags

CVE-2021-21739

 

Severity Score

4.6
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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>

Un producto de ZTE de la capa de acceso a la red de transporte presenta una vulnerabilidad de seguridad. Debido a que el sistema no verifica suficientemente la fiabilidad de los datos, unos atacantes podrían sustituir un módulo óptico autenticado en el equipo por otro no autenticado, omitiendo la autentificación y detección del sistema, afectando así a la transmisión de la señal. Esto afecta a:

*Credits: N/A
CVSS Scores
Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-01-04 CVE Reserved
  • 2021-08-05 CVE Published
  • 2024-04-20 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-345: Insufficient Verification of Data Authenticity
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Zte
Search vendor "Zte"
 Zxctn 6120h Firmware
Search vendor "Zte" for product "Zxctn 6120h Firmware"
 5.10.00b24
Search vendor "Zte" for product "Zxctn 6120h Firmware" and version "5.10.00b24"
-
Affected
in Zte
Search vendor "Zte"
 Zxctn 6120h
Search vendor "Zte" for product "Zxctn 6120h"
--
Safe