Is CVE-2021-26589 in the CISA KEV catalog?

No. CVE-2021-26589 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-26589?

CVE-2021-26589 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2021-26589?

CVE-2021-26589 has an EPSS score of 0.53% (41th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26589?

Upgrade superdome flex 280 firmware to 3.40.106 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-26589

MEDIUM

6.1

CVSS v3

NVD

Description

A potential security vulnerability has been identified in HPE Superdome Flex Servers. The vulnerability could be remotely exploited to allow Cross Site Scripting (XSS) because the Session Cookie is missing an HttpOnly Attribute. HPE has provided a firmware update to resolve the vulnerability in HPE Superdome Flex Servers.

CWE-732Incorrect Permission Assignment for Critical Resource

How to fix

Remediation Available

superdome flex 280 firmwareNVD

Affected:< 3.40.106Fixed in:3.40.106CVE-2021-26589derived from NVD

superdome flex firmwareNVD

Affected:< 3.40.106Fixed in:3.40.106CVE-2021-26589derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.53%probability of exploitation in 30 days

41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Vendor Advisory1

support.hpe.com

Related Vulnerabilities

Other CWE-732 (Incorrect Permission Assignment for Critical Resource) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2011-3923	Critical	9.8	89%	-	Fix
CVE-2018-15379	Critical	9.8	86%	-	-
CVE-2018-1000207	High	7.2	64%	-	-
CVE-2023-32986	High	8.8	63%	-	-
CVE-2021-44521	Critical	9.1	55%	-	Fix
CVE-2018-13374	Medium	4.3	38%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.