What is the CVSS score of CVE-2026-28548?

CVE-2026-28548 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-28548?

Within 24 hours: Inventory all affected email systems and disable non-critical email features leveraging the vulnerable verification mechanism; notify all users of the vulnerability and interim restrictions. Within 7 days: Implement network segmentation to restrict email service access to authorized networks only and deploy enhanced logging/monitoring on email systems. Within 30 days: Establish regular communication with the vendor for patch availability, conduct a full security assessment of email infrastructure, and prepare a rollback plan.

Emui CVE-2026-28548

HIGH

Improper Privilege Management (CWE-269)

2026-03-05 psirt@huawei.com

Privilege Escalation Emui Harmonyos Huawei

7.1

CVSS 3.1 · NVD

View

Attack ChainAIDerived

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

Access

User receives malicious email
Exploit

User opens email attachment or link
Execution

Application fails to verify sender authenticity
Impact

Attacker gains access to email service and messages

Vulnerability Assessment

Weakness	CWE CWE-269 OWASP Top 10:2025 A06:2025 - Insecure Design ASVS 5.0 V8 - Authorization Least privilege enforcement MITRE ATT&CK 1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Local system access required. User must interact with email (UI:R). Default email application with improper verification of sender credentials or message authenticity enabled.
Impact	CVSS 7.1 (HIGH). Attack vector: Local. Complexity: Low. Privileges required: None. User interaction: Required.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to compromise the affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Vulnerability of improper verification in the email application. Impact: Successful exploitation of this vulnerability may affect service confidentiality. [CVSS 7.1 HIGH]

RemediationAI

Monitor vendor advisories for a patch.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

Classified as CWE-269 (Improper Privilege Management). Affects Emui. Vulnerability of improper verification in the email application. Impact: Successful exploitation of this vulnerability may affect service confidentiality.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.1 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

DescriptionCVE.org

Vulnerability of improper verification in the email application. Impact: Successful exploitation of this vulnerability may affect service confidentiality.

Executive ViewAI

Why It Matters

CVE-2026-28548 is a HIGH severity vulnerability affecting email applications through improper verification, potentially compromising the confidentiality of email communications and sensitive data. Without an available patch, immediate mitigation measures are required to reduce organizational exposure while awaiting vendor remediation.

Business Impact: High

Compensating Controls

Implement network segmentation to limit email service access; deploy enhanced email logging and DLP (Data Loss Prevention) controls to detect suspicious access patterns; disable or restrict the specific verification feature if functionally possible; enforce multi-factor authentication (MFA) for email access; monitor for exploitation attempts through SIEM and intrusion detection systems; consider temporarily restricting email access to VPN connections only; establish formal vendor communication for patch timeline.

Threat Intelligence Overview

EPSS Score

0.0%

Top 100% 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 HIGH

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

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

Scheduled

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +36

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Privilege Escalation HIGH

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.