CVE-2021-26588

A potential security vulnerability has been identified in HPE 3PAR StoreServ, HPE Primera Storage and HPE Alletra 9000 Storage array firmware. An unauthenticated user could remotely exploit the low complexity issue to execute code as administrator. This vulnerability impacts completely the confidentiality, integrity, availability of the array. HPE has made the following software updates and mitigation information to resolve the vulnerability in 3PAR, Primera and Alletra 9000 firmware.

Published: 2021-10-11 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-26588 is rated High Risk (65.4/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.71%). High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-26588

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 3.70% 1.71% -1.99%
2 2025-03-29 1.71% 3.70% +1.99%
3 2025-03-17 — 1.71% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-26588

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2021-26588

Affected software / configurations for CVE-2021-26588

Vendor Product Version Raw CPE
hpe 3par_os 3.3.1_mp5_p156 cpe:2.3:o:hpe:3par_os:3.3.1_mp5_p156:*:*:*:*:*:*:*
hpe 3par_os 3.3.1_mu1 cpe:2.3:o:hpe:3par_os:3.3.1_mu1:*:*:*:*:*:*:*
hpe 3par_os 3.3.1_mu2_p157 cpe:2.3:o:hpe:3par_os:3.3.1_mu2_p157:*:*:*:*:*:*:*
hpe 3par_os 3.3.2_ga_p_01 cpe:2.3:o:hpe:3par_os:3.3.2_ga_p_01:*:*:*:*:*:*:*
hpe primera_630_firmware >= 4.0.0, <= 4.3.3 cpe:2.3:o:hpe:primera_630_firmware:*:*:*:*:*:*:*:*
hpe primera_650_firmware >= 4.0.0, <= 4.3.3 cpe:2.3:o:hpe:primera_650_firmware:*:*:*:*:*:*:*:*
hpe primera_670_firmware >= 4.0.0, <= 4.3.3 cpe:2.3:o:hpe:primera_670_firmware:*:*:*:*:*:*:*:*
hpe alletra_9060_firmware >= 9.3.0, <= 9.4.0 cpe:2.3:o:hpe:alletra_9060_firmware:*:*:*:*:*:*:*:*
hpe alletra_9080_firmware >= 9.3.0, <= 9.4.0 cpe:2.3:o:hpe:alletra_9080_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-26588

cvelogic Threat Intelligence