What’s Vulnerable › Vulnerabilities

CVE-2021-42849

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-18 · updated 2026-06-17
• Weakness: CWE-798

Description

A weak default password for the serial port was reported in some Lenovo Personal Cloud Storage devices that could allow unauthorized device access to an attacker with physical access.

Affected products

• Lenovo A1 Firmware: before 5.3.6.a1 — fixed in 5.3.6.a1
• Lenovo T1 Firmware: before 5.3.6.t1 — fixed in 5.3.6.t1
• Lenovo T2 Firmware: before 5.3.8.t2 — fixed in 5.3.8.t2
• Lenovo T2Pro Firmware: before 5.3.7.t2-pro — fixed in 5.3.7.t2-pro
• Lenovo X1 Firmware: before 5.3.8.x1 — fixed in 5.3.8.x1

How to fix

Upgrade to a fixed version: Lenovo A1 Firmware 5.3.6.a1; Lenovo T1 Firmware 5.3.6.t1; Lenovo T2 Firmware 5.3.8.t2; Lenovo T2Pro Firmware 5.3.7.t2-pro; Lenovo X1 Firmware 5.3.8.x1. Check the vendor advisory for mitigations.

References

• https://iknow.lenovo.com.cn/detail/dc_200017.html
• https://iknow.lenovo.com.cn/detail/dc_200017.html

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