CVE-2021-26589
CVE-2021-26589 is a medium-severity vulnerability in Hpe Superdome Flex Firmware with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-732.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (41st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-732
- Affected product: Hpe Superdome Flex Firmware
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-26589?
- 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.
- How severe is CVE-2021-26589?
- CVE-2021-26589 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-26589 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-26589?
- CVE-2021-26589 primarily affects Hpe Superdome Flex Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-26589?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-26589 published?
- CVE-2021-26589 was published on 2021-10-19 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:o:hpe:superdome_flex_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:hpe:superdome_flex_280_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Hpe Superdome Flex Firmware
- CVE-2022-37933 — High (CVSS 7.3): A potential security vulnerability has been identified in HPE Superdome Flex and Superdome Flex 280 servers. The…
All CVEs affecting Hpe Superdome Flex Firmware →
Other CWE-732 (Incorrect Permission Assignment for Critical Resource) vulnerabilities
- CVE-2026-9508 — Critical (CVSS 10.0): Incorrect permission settings on a critical resource in Suprema BioStar 2 (versions 2.9.3 through 2.9.11) that allow…
- CVE-2025-14988 — Critical (CVSS 10.0): A security issue has been identified in ibaPDA that could allow unauthorized actions on the file system under certain…
- CVE-2025-69426 — Critical (CVSS 10.0): The Ruckus vRIoT IoT Controller firmware versions prior to 3.0.0.0 (GA) contain hardcoded credentials for an operating…
- CVE-2025-12004 — Critical (CVSS 10.0): Incorrect Permission Assignment for Critical Resource vulnerability in The Wikimedia Foundation Mediawiki - Lockdown…
- CVE-2014-125121 — Critical (CVSS 10.0): Array Networks vAPV (version 8.3.2.17) and vxAG (version 9.2.0.34) appliances are affected by a privilege escalation…
- CVE-2025-46093 — Critical (CVSS 9.9): LiquidFiles before 4.1.2 supports FTP SITE CHMOD for mode 6777 (setuid and setgid), which allows FTPDrop users to…
Browse all CWE-732 (Incorrect Permission Assignment for Critical Resource) vulnerabilities →