How severe is CVE-2021-26587?

CVE-2021-26587 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-26587 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26587?

CVE-2021-26587 primarily affects Hpe Storeonce 5200 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26587?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-26587 published?

CVE-2021-26587 was published on 2021-09-27 and last updated on 2026-06-17.

CVE-2021-26587

CVE-2021-26587 is a medium-severity vulnerability in Hpe Storeonce 5200 Firmware with a CVSS 3.x base score of 6.5. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.0
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Hpe Storeonce 5200 Firmware
Published: 2021-09-27
Last modified: 2026-06-17

Description

A potential DOM-based Cross Site Scripting security vulnerability has been identified in HPE StoreOnce. The vulnerability could be remotely exploited to cause an elevation of privilege leading to partial impact to confidentiality, availability, and integrity. HPE has made the following software update - HPE StoreOnce 4.3.0, to resolve the vulnerability in HPE StoreOnce.

Frequently asked questions

What is CVE-2021-26587?: A potential DOM-based Cross Site Scripting security vulnerability has been identified in HPE StoreOnce. The vulnerability could be remotely exploited to cause an elevation of privilege leading to partial impact to confidentiality, availability, and integrity. HPE has made the following software update - HPE StoreOnce 4.3.0, to resolve the vulnerability in HPE StoreOnce.
How severe is CVE-2021-26587?: CVE-2021-26587 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-26587 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26587?: CVE-2021-26587 primarily affects Hpe Storeonce 5200 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26587?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26587 published?: CVE-2021-26587 was published on 2021-09-27 and last updated on 2026-06-17.

References

https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst04176en_us

Affected products (6)

cpe:2.3:o:hpe:storeonce_5200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hpe:storeonce_5650_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hpe:storeonce_5250_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hpe:storeonce_3640_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hpe:storeonce_3620_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:hpe:storeonce_vsa_4tb_firmware:*:*:*:*:*:*:*:*

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