What is the CVSS score of CVE-2019-5220?

CVE-2019-5220 has a CVSS 3.0 base score of 4.6 (Medium). CVSS vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.2%.

Mate 20 Firmware CVE-2019-5220

MEDIUM

Incorrect Authorization (CWE-863)

2019-07-10 psirt@huawei.com

Authentication Bypass Huawei Mate 20 Firmware Mate 20 X Firmware Honor Magic 2 Firmware

4.6

CVSS 3.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-863 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Authorization logic validation 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
Impact	CVSS score of 4.6 (MEDIUM). Attack characteristics: physical attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to bypass authorization checks to access restricted resources. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAI

There is a Factory Reset Protection (FRP) bypass vulnerability on several smartphones. Rated medium severity (CVSS 4.6), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Review and test authorization logic, implement consistent access control checks, use centralized authorization framework.

Affects your stack

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

Technical ContextAI · show details

This vulnerability is classified as Incorrect Authorization (CWE-863), which allows attackers to bypass authorization checks to access restricted resources. There is a Factory Reset Protection (FRP) bypass vulnerability on several smartphones. The system does not sufficiently verify the permission, an attacker could do a certain operation on certain step of setup wizard. Successful exploit could allow the attacker bypass the FRP protection. Affected products: Mate 20 X, versions earlier than Ever-AL00B 9.0.0.200(C00E200R2P1); Mate 20, versions earlier than Hima-AL00B/Hima-TL00B 9.0.0.200(C00E200R2P1); Honor Magic 2, versions earlier than Tony-AL00B/Tony-TL00B 9.0.0.182(C00E180R2P2). Affected products include: Huawei Mate 20 X Firmware, Huawei Mate 20 Firmware, Huawei Honor Magic 2 Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 4.6 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

DescriptionNVD

There is a Factory Reset Protection (FRP) bypass vulnerability on several smartphones. The system does not sufficiently verify the permission, an attacker could do a certain operation on certain step of setup wizard. Successful exploit could allow the attacker bypass the FRP protection. Affected products: Mate 20 X, versions earlier than Ever-AL00B 9.0.0.200(C00E200R2P1); Mate 20, versions earlier than Hima-AL00B/Hima-TL00B 9.0.0.200(C00E200R2P1); Honor Magic 2, versions earlier than Tony-AL00B/Tony-TL00B 9.0.0.182(C00E180R2P2).

Threat Intelligence Overview

EPSS Score

0.2%

Top 87% exploitable

Data Quality

2 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 MEDIUM

CISA KEV No

Public POC No

EPSS 0.2%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

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

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +23

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:o:huawei:mate_20_x_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:huawei:mate_20_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:huawei:honor_magic_2_firmware:*:*:*:*:*:*:*:*

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References

Advisories & patches

ADVISORY https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190626-01-frp-en

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

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