CVE-2021-26581

Name: CVE-2021-26581
Creator: NVD / NIST
Published: 2021-04-01T19:15:13.887+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.84%

Last modified Jun 17, 2026

CVE-2021-26581 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.84% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.84%

53.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Hpe	Superdome Flex Server Firmware	< 3.30.142

References

Timeline

Published: Apr 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26581?

How severe is CVE-2021-26581?

CVE-2021-26581 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.84% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26581?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26581?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST