CVE-2021-26587

Name: CVE-2021-26587
Creator: NVD / NIST
Published: 2021-09-27T15:15:07.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.48%

Last modified Jun 17, 2026

CVE-2021-26587 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.48%

37.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Hpe	Storeonce 5200 Firmware	<= 4.2.3
Hpe	Storeonce 5650 Firmware	<= 4.2.3
Hpe	Storeonce 5250 Firmware	<= 4.2.3
Hpe	Storeonce 3640 Firmware	<= 4.2.3
Hpe	Storeonce 3620 Firmware	<= 4.2.3
Hpe	Storeonce Vsa 4tb Firmware	<= 4.2.3

References

Timeline

Published: Sep 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26587?

How severe is CVE-2021-26587?

CVE-2021-26587 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26587?

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-2021-26587?

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

Scan your code now

Source: NVD / NIST