CVE-2021-3297

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

On Zyxel NBG2105 V1.00(AAGU.2)C0 devices, setting the login cookie to 1 provides administrator access.

En dispositivos Zyxel NBG2105 versión V1.00 (AAGU.2)CO, al establecer la cookie de inicio de sesión en 1 proporciona acceso de administrador

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-25 CVE Reserved
2021-01-26 CVE Published
2024-08-03 CVE Updated
2024-08-03 First Exploit
2024-08-05 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-287: Improper Authentication

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105	2021-02-03
https://www.zyxel.com/us/en/support/security_advisories.shtml	2021-02-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Zyxel Search vendor "Zyxel"	Nbg2105 Firmware Search vendor "Zyxel" for product "Nbg2105 Firmware"	v1.00\(aagu.2\)c0 Search vendor "Zyxel" for product "Nbg2105 Firmware" and version "v1.00\(aagu.2\)c0"	-	Affected	in	Zyxel Search vendor "Zyxel"	Nbg2105 Search vendor "Zyxel" for product "Nbg2105"	-	-	Safe