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CVE-2026-18451— Supermicro BMC's iKVM feature is vulnerable to KVM session hijacking due to a predictable time-seeded launch token

Quick assessment

Affected
SMCI MBD-X12SPI
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HTML5 基于 IP 的 KVM 控制台通过由 Web 界面返回的令牌进行身份验证。如果令牌生成机制存在缺陷，攻击者可能猜测出会话令牌，从而接管 KVM 会话。

CVSS 3.1 · Low

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-18451

Vulnerability Information
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Vulnerability Title
Supermicro BMC's iKVM feature is vulnerable to KVM session hijacking due to a predictable time-seeded launch token
Source: CVE Program / CVE List V5
Vulnerability Description
The HTML5 KVM-over-IP console authenticates with a token returned by the web interface. Weaknesses in token generation may allow an attacker to guess the session token and take control of the KVM session.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
PRNG中使用可预测种子
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SMCI MBD-X12SPI 01.07.20 -

II. Public POCs for CVE-2026-18451

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III. Intelligence Information for CVE-2026-18451

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Other References for CVE-2026-18451 (1)

Same Patch Batch · SMCI · 2026-10-27 · 9 CVEs total

CVE-2026-18450 9.8 CRITICAL Supermicro BMC contains Unprotected IPMI Commands Accepted on Active RMCP+ Sessions vulne
CVE-2026-65220 8.8 HIGH Supermicro BMC IPMI feature contains a Privilege escalation vulnerability
CVE-2026-18449 7.5 HIGH Supermicro BMC contains a SMCRAKP Fixed Key vulnerability
CVE-2026-65219 7.4 HIGH Supermicro BMC contains Unordered RAKP Message 3 Grants an IPMI Session vulnerability
CVE-2026-16521 7.2 HIGH Supermicro BMC's syslog feature contains a command injection vulnerability
CVE-2026-65211 7.2 HIGH Supermicro BMC IPMI feature contains Critical Privilege Escalation and Arbitrary Access v
CVE-2026-65213 6.6 MEDIUM Supermicro BMC IPMI feature contains a Arbitrary Command Execution with Superuser Privileg
CVE-2026-65210 4.9 MEDIUM Supermicro BMC IPMI feature contains Arbitrary File Access vulnerability

IV. Related Vulnerabilities

Same product: MBD-X12SPI
Same vendor: SMCI
Same weakness: CWE-337