CVE-2026-18451 PUBLISHED

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

Assigner: Supermicro
Reserved: 31.07.2026 Published: 27.10.2026 Updated: 27.10.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS Score: 3.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	None
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	SMCI
Product	MBD-X12SPI
Versions	Default: affected Version 01.07.20 is affected

Credits

runZero finder

References

https://www.supermicro.com/en/support/security_BMC_IPMI_Oct_2026_1

Problem Types

CWE-337: Predictable Seed in a Pseudo-Random Number Generator (PRNG) CWE

Impacts

CAPEC-59: Session Hijacking