Lenovo Thinkcentre m820z All-In-One Firmware vulnerabilities

6 CVEs affecting Lenovo Thinkcentre m820z All-In-One Firmware, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2023-45079, published 2023-11-08.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2023-45076, published 2023-11-08. Medium severity, CVSS 6.7. EPSS: 0.2% chance of exploitation in the next 30 days. A memory leakage vulnerability was reported in the 534D0140 DXE driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
• CVE-2023-45075, published 2023-11-08. Medium severity, CVSS 6.7. EPSS: 0.2% chance of exploitation in the next 30 days. A memory leakage vulnerability was reported in the SWSMI_Shadow DXE driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
• CVE-2023-45078, published 2023-11-08. Medium severity, CVSS 6.7. EPSS: 0.2% chance of exploitation in the next 30 days. A memory leakage vulnerability was reported in the DustFilterAlertSmm SMM driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
• CVE-2023-45079, published 2023-11-08. Medium severity, CVSS 6.7. EPSS: 0.2% chance of exploitation in the next 30 days. A memory leakage vulnerability was reported in the NvmramSmm SMM driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
• CVE-2023-45077, published 2023-11-08. Medium severity, CVSS 6.7. EPSS: 0.2% chance of exploitation in the next 30 days. A memory leakage vulnerability was reported in the 534D0740 DXE driver that may allow a local attacker with elevated privileges to write to NVRAM variables.
• CVE-2022-40134, published 2023-01-30. Medium severity, CVSS 4.4. EPSS: 0.2% chance of exploitation in the next 30 days. An information leak vulnerability in the SMI Set BIOS Password SMI Handler in some Lenovo models may allow an attacker with local access and elevated privileges to read SMM memory.