What’s Vulnerable › Vulnerabilities

CVE-2020-8333

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-24 · updated 2026-06-17

Description

A potential vulnerability in the SMI callback function used in the EEPROM driver in some Lenovo Desktops and ThinkStation models may allow arbitrary code execution

Affected products

• Lenovo 63 Firmware: before fckt98a — fixed in fckt98a
• Lenovo H50-30G Firmware: before fckt98a — fixed in fckt98a
• Lenovo M4500 Firmware: before fckt98a — fixed in fckt98a
• Lenovo M4550 Firmware: before fckt98a — fixed in fckt98a
• Lenovo Qitian 4500 Firmware: before fckt98a — fixed in fckt98a
• Lenovo Qitian B4550 Firmware: before fckt98a — fixed in fckt98a
• Lenovo Qitian M4550 Firmware: before fckt98a — fixed in fckt98a
• Lenovo Thinkcentre E73 Firmware: before fckt98a — fixed in fckt98a
• Lenovo Thinkcentre E73S Firmware: before fckt98a — fixed in fckt98a
• Lenovo Thinkcentre E93 Firmware: before fbktdea — fixed in fbktdea
• Lenovo Thinkcentre M4500K Firmware: before fckt98a — fixed in fckt98a
• Lenovo Thinkcentre M4500Q Firmware: before fhkt85a — fixed in fhkt85a
• Lenovo Thinkcentre M4500S Firmware: before fckt98a — fixed in fckt98a
• Lenovo Thinkcentre M4500T Firmware: before fckt98a — fixed in fckt98a
• Lenovo Thinkcentre M9350Z Firmware: before fekta2a — fixed in fekta2a
• Lenovo Thinkcentre M93Z Firmware: before fekta2a — fixed in fekta2a
• Lenovo Thinkstation C30 Firmware: before a3kt70a — fixed in a3kt70a
• Lenovo Thinkstation D30 Firmware: before a3kt70a — fixed in a3kt70a
• Lenovo Thinkstation E32 Firmware: before fbktdea — fixed in fbktdea
• Lenovo Thinkstation P300 Firmware: before a2kt70a — fixed in a2kt70a
• Lenovo Thinkstation S30 Firmware: before a2kt70a — fixed in a2kt70a
• Lenovo Yangtian Afh81 Firmware: before fckt98a — fixed in fckt98a
• Lenovo Yangtian Mc H81 Firmware: before fckt98a — fixed in fckt98a
• Lenovo Yangtian Mf H81 Pci Firmware: before fckt98a — fixed in fckt98a
• Lenovo Yangtian Tc H81 Pci Firmware: before fckt98a — fixed in fckt98a
• Lenovo Yangtian Wcc H81 Pci Firmware: before fckt98a — fixed in fckt98a
• Lenovo Yangtian Wf H81 Pci Firmware: before fckt98a — fixed in fckt98a

How to fix

Upgrade to a fixed version: Lenovo 63 Firmware fckt98a; Lenovo H50-30G Firmware fckt98a; Lenovo M4500 Firmware fckt98a; Lenovo M4550 Firmware fckt98a; Lenovo Qitian 4500 Firmware fckt98a; Lenovo Qitian B4550 Firmware fckt98a; Lenovo Qitian M4550 Firmware fckt98a; Lenovo Thinkcentre E73 Firmware fckt98a; Lenovo Thinkcentre E73S Firmware fckt98a; Lenovo Thinkcentre E93 Firmware fbktdea; Lenovo Thinkcentre M4500K Firmware fckt98a; Lenovo Thinkcentre M4500Q Firmware fhkt85a. Check the vendor advisory for mitigations.

References

• https://support.lenovo.com/us/en/product_security/LEN-30042
• https://support.lenovo.com/us/en/product_security/LEN-30042

Get alerted when CVE-2020-8333 or the next vulnerability affects your stack