A vulnerability in specific versions of Zyxel NBG6818, NBG7815, WSQ20, WSQ50, WSQ60, and WSR30 firmware with pre-configured password management could allow an attacker to obtain root access of the device, if the local attacker dismantles the device and uses a USB-to-UART cable to connect the device, or if the remote assistance feature had been enabled by an authenticated user.

Threat-Mapped Scoring

Score: 3.25

Priority: P2 - Serious (High)

• S1 – Steal Customer Account Information
• S9 – Sabotage of System/App (+0.25 bonus)

EPSS

Score: 0.00036
Percentile: 0.08779

CVSS Scoring

Mapped CWE(s)

• CWE-260 : Password in Configuration File
• CWE-287 : Improper Authentication

All CAPEC(s)

CAPEC(s) with Mapped TTPs

Mapped ATT&CK TTPs

• T1548 : Abuse Elevation Control Mechanism
  Kill Chain: privilege-escalation
• T1548 : Abuse Elevation Control Mechanism
  Kill Chain: privilege-escalation
• T1040 : Network Sniffing
  Kill Chain: credential-access
• T1185 : Browser Session Hijacking
  Kill Chain: collection
• T1550.001 : Application Access Token
  Kill Chain: defense-evasion
• T1563 : Remote Service Session Hijacking
  Kill Chain: lateral-movement
• T1134 : Access Token Manipulation
  Kill Chain: defense-evasion
• T1505.003 : Web Shell
  Kill Chain: persistence
• T1557 : Adversary-in-the-Middle
  Kill Chain: credential-access

Malware

APTs Threat Group Associations

Campaigns

Affected Products

• cpe:2.3:o:zyxel:nbg6818_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:nbg7815_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:wsq20_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:wsq50_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:wsq60_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:zyxel:wsr30_firmware:*:*:*:*:*:*:*:*

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