CVE-2023-35861Public exploitNetwork attack vector

Unauthenticated root command execution via login events

Published Jul 31, 2023 · Updated Oct 22, 2024

OS command injection in Supermicro H12DST-B BMC firmware before 03.10.35 allows remote attackers to execute commands as root. The SMTP notification handler interpolates attacker-controlled login-event text into an echo pipeline and passes it to run_shellcmd without neutralizing shell syntax. When login-event email alerts are enabled, a crafted unauthenticated username reaches this path and grants control of the out-of-band management controller.

CVSS severity9.8
Critical
EPSS probability2.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Supermicro H12DST-B BMC firmware before 03.10.35 allows remote attackers to execute commands as root. The SMTP notification handler interpolates attacker-controlled login-event text into an echo pipeline and passes it to run_shellcmd without neutralizing shell syntax. When login-event email alerts are enabled, a crafted unauthenticated username reaches this path and grants control of the out-of-band management controller.

The record

CVE
CVE-2023-35861
Published
Jul 31, 2023
Updated
Oct 22, 2024
Vendor
Supermicro
Product
H12DST-B
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <03.10.35

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Supermicro · H12DST-Bversion=0 <03.10.35

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

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

Technologies

Your stack

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Your stack

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