What is the CVSS score of CVE-2026-28710?

CVE-2026-28710 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 CVE-2026-28710?

Within 24 hours: Identify all instances of Acronis Cyber Protect 17 and isolate affected systems from sensitive networks if possible. Within 7 days: Implement network segmentation to restrict access to Acronis services, enforce strong authentication at the network perimeter, and disable unnecessary remote access features. Within 30 days: Evaluate upgrade paths to patched versions (build 41186 or later), coordinate with Acronis for patch availability, or consider alternative backup solutions if patching timeline extends beyond risk tolerance.

Cyber Protect CVE-2026-28710

CRITICAL

Weak Authentication (CWE-1390)

2026-03-06 security@acronis.com

Windows Information Disclosure Linux Cyber Protect Acronis

9.8

CVSS 3.1 · NVD

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Send unauthenticated network request
Exploit

Bypass authentication mechanism
Execution

Access sensitive data and configuration
Impact

Modify system parameters without authorization

Vulnerability Assessment

Weakness	CWE CWE-1390 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Strong authentication
Exploitation Conditions	No special conditions — remote unauthenticated exploitation against Acronis Cyber Protect 17 (Linux, Windows) builds before 41186 with default network exposure.
Impact	CVSS 9.8.
Exploit ScenarioDerived	Bypass authentication.

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

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Improper authentication in Acronis Cyber Protect 17.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:06 CVSS 9.8

Auth issue in Acronis Cyber Protect 17.

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Technical ContextAI · show details

CWE-1390.

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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

DescriptionCVE.org

Sensitive information disclosure and manipulation due to improper authentication. The following products are affected: Acronis Cyber Protect 17 (Linux, Windows) before build 41186.

Executive ViewAI

Why It Matters

A critical vulnerability in Acronis Cyber Protect 17 allows attackers to bypass authentication and access or modify sensitive data with a 9.8 CVSS score. Organizations running affected versions on Linux or Windows systems face immediate risk of unauthorized data disclosure and potential system compromise, with no vendor patch currently available.

Business Impact: Severe

Compensating Controls

Restrict network access to Acronis Cyber Protect 17 services using firewalls and network segmentation; implement Web Application Firewall (WAF) rules to block suspicious authentication attempts; enforce multi-factor authentication at network boundaries where possible; disable remote management and API access features if not operationally required; increase monitoring and logging of authentication events and data access; apply principle of least privilege to service accounts; consider temporary air-gapping of backup infrastructure until patch is available.

Threat Intelligence Overview

EPSS Score

0.1%

Top 75% exploitable

Data Quality

3 sources

Confidence: Low

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 No

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.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +49

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.