What’s Vulnerable › Vulnerabilities

CVE-2021-26581

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-01 · updated 2026-06-17

Description

A potential security vulnerability has been identified in HPE Superdome Flex server. A denial of service attack can be remotely exploited leaving hung connections to the BMC web interface. The monarch BMC must be rebooted to recover from this situation. Other BMC management is not impacted. HPE has made the following software update to resolve the vulnerability in HPE Superdome Flex Server: Superdome Flex Server Firmware 3.30.142 or later.

Affected products

• HPE Superdome Flex Server: before 3.30.142 — fixed in 3.30.142

How to fix

Upgrade to a fixed version: HPE Superdome Flex Server 3.30.142. Check the vendor advisory for mitigations.

References

• https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf04102en_us
• https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf04102en_us

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