What is the CVSS score of EUVD-2025-16657?

EUVD-2025-16657 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate EUVD-2025-16657?

Within 24 hours: identify all HPE StoreOnce systems in your environment and take an inventory of current versions; isolate affected systems from untrusted networks if patching cannot be completed immediately. Within 7 days: apply vendor-released patches to all HPE StoreOnce systems and validate successful deployment. Within 30 days: conduct a full audit of StoreOnce backup systems for signs of unauthorized access and review backup integrity.

Storeonce System EUVD-2025-16657

Q: Which versions of Storeonce System are affected by EUVD-2025-16657?

CVE-2025-37093 is a critical authentication bypass vulnerability in HPE StoreOnce backup storage software (CVSS 9.8) that could allow unauthenticated attackers to gain unauthorized access to backup…. A patch is available.

| CVE-2025-37093 CRITICAL

Improper Authentication (CWE-287)

2025-06-02 security-alert@hpe.com

Authentication Bypass Storeonce System Hpe

9.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-287 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Authentication mechanism validation MITRE ATT&CK 2 techniques across 2 tactics: Defense Evasion, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS 9.8. Backup infrastructure compromise.
Exploit ScenarioDerived	Exploit auth bypass to compromise backup storage.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 14, 2026

Auth Bypass in HPE StoreOnce backup storage software. One of 6 critical CVEs.

Earlier versions of this analysis (1)

v1 Mar 14, 2026 - 16:47 CVSS 9.8

auth bypass in HPE StoreOnce.

RemediationAI

Apply HPE security update.

Affected VersionsENISA

HPE StoreOnce Software 0 <4.3.11

Affected Packages

euvd hpe_storeonce_software fix: 4.3.11

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

HPE StoreOnce backup appliance — auth bypass.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 05:55 EUVD-patch-fix

executive summary

Patch available

Apr 16, 2026 - 05:29 EUVD

4.3.11

CVE Published

Jun 02, 2025 - 14:15 nvd

CRITICAL 9.8

DescriptionCVE.org

An authentication bypass vulnerability exists in HPE StoreOnce Software.

Executive ViewAI

Why It Matters

CVE-2025-37093 is a critical authentication bypass vulnerability in HPE StoreOnce backup storage software (CVSS 9.8) that could allow unauthenticated attackers to gain unauthorized access to backup systems. This directly threatens data confidentiality and integrity across backup infrastructure, potentially exposing or corrupting your organization's backup data and violating recovery objectives.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If patch cannot be deployed immediately: segment StoreOnce systems to trusted networks only, restrict administrative access to documented IP ranges, enforce strong authentication mechanisms at network perimeter, and enable enhanced logging and monitoring for all StoreOnce access attempts.

Threat Intelligence Overview

EPSS Score

0.1%

Top 76% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.