CVE-2023-4857

HIGH

7.5

CVSS Score

Published: April 15, 2024 at 06:00 PM UTC

Updated: June 17, 2026 at 06:38 AM UTC

3 products affected across 1 vendorSystem Management Module FirmwareSystem Management ModuleFan Power Controller

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Severity

HIGH7.5

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

An authentication bypass vulnerability was identified in SMM/SMM2 and FPC that could allow an authenticated user to execute certain IPMI calls that could lead to exposure of limited system information.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

System Management Module Firmware · Lenovo

95%

1.24 ≤ v < tesm40b-1.271.24

Affected range stops below tesm40b-1.27, so it looks safe — our inference, not a vendor statement

System Management Module · Lenovo

90%

1.24 ≤ v < tesm40b-1.271.24

Affected range stops below tesm40b-1.27, so it looks safe — our inference, not a vendor statement

Fan Power Controller · Lenovo

60%

v < fhet62a-3.50

Affected range stops below fhet62a-3.50, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: [email protected]

https://support.lenovo.com/us/en/product_security/LEN-140420

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHlenovo

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-306

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