CVE-2025-6198Public exploitNetwork attack vector

Firmware compromise via attacker-controlled signing-table offsets

Published Sep 19, 2025 · Updated Feb 26, 2026

Firmware signature verification in Supermicro X13SEM-F BMC firmware 01.03.47 and 01.04.15 allows remote authenticated users to run custom firmware. The auth_bmc_sig function trusts attacker-controlled sig_table offsets when selecting regions for SHA-512 verification, so modified kernel bytes can be excluded while relocated originals satisfy the signed digest. Exploitation requires BMC administrator privileges or convincing an administrator to upload the image; successful boot executes a customized BMC Linux kernel and can persist across BMC reboots.

CVSS severity7.2
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Firmware signature verification in Supermicro X13SEM-F BMC firmware 01.03.47 and 01.04.15 allows remote authenticated users to run custom firmware. The auth_bmc_sig function trusts attacker-controlled sig_table offsets when selecting regions for SHA-512 verification, so modified kernel bytes can be excluded while relocated originals satisfy the signed digest. Exploitation requires BMC administrator privileges or convincing an administrator to upload the image; successful boot executes a customized BMC Linux kernel and can persist across BMC reboots.

The record

CVE
CVE-2025-6198
Published
Sep 19, 2025
Updated
Feb 26, 2026
Vendor
Super Micro Computer, Inc.
Product
X13SEM-F
Classifications
CWE-347, T1542.001
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=01.03.47

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Super Micro Computer, Inc. · X13SEM-Fversion=01.03.47

Published CVSS scores

7.2BinarlyCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2SupermicroCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.4National Vulnerability DatabaseCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1542.001Pre-OS Boot: System Firmware

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo