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CVE-2021-21548

HIGH
7.4
CVSS Score
Published: March 17, 2023 at 05:07 AM UTC
Updated: June 17, 2026 at 03:35 AM UTC
4 products affected across 1 vendorPowermax OSEMC Unisphere for PowermaxEMC Unisphere for Powermax Virtual Appliance

Using Unisphere for PowerMax, Dell EMC Unisphere for PowerMax Virtual Appliance , PowerMax OS by Dell?

Get instant alerts when new vulnerabilities affect Unisphere for PowerMax, Dell EMC Unisphere for PowerMax Virtual Appliance , PowerMax OS - before attackers find them.

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Severity
HIGH7.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Dell EMC Unisphere for PowerMax versions before 9.1.0.27, Dell EMC Unisphere for PowerMax Virtual Appliance versions before 9.1.0.27, and PowerMax OS Release 5978 contain an improper certificate validation vulnerability. An unauthenticated remote attacker may potentially exploit this vulnerability to carry out a man-in-the-middle attack by supplying a crafted certificate and intercepting the victim's traffic to view or modify a victim’s data in transit.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

EMC Unisphere for Powermax· Dell
95%
v < 9.1.0.27
Affected range stops below 9.1.0.27, so it looks safe — our inference, not a vendor statement
EMC Unisphere for Powermax Virtual Appliance· Dell
95%
v < 9.1.0.27
Affected range stops below 9.1.0.27, so it looks safe — our inference, not a vendor statement
Powermax OS· Dell
95%
v < 9.1.0.275978
Affected range stops below 9.1.0.27, so it looks safe — our inference, not a vendor statement
Unisphere for PowerMax· Dell
60%
v < 9.1.0.275978
Affected range stops below 9.1.0.27, so it looks safe — our inference, not a vendor statement

References (1)

Vendor Advisory
Source: [email protected]
https://www.dell.com/support/kbdoc/en-uk/000189606/dsa-2021-134-dell-emc-unisphere-for-powermax-dell-emc-unisphere-for-powermax-virtual-appliance-dell-emc-solutions-enabler-virtual-appliance-and-dell-emc-powermax-embedded-management-security-update-for-multiple-third-party-component-vulnerabilities

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.4HIGHdell
Attack Vector
LOCAL
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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