What is the CVSS score of CVE-2019-5478?

CVE-2019-5478 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.2%.

Zu11Eg Firmware CVE-2019-5478

MEDIUM

Violation of Secure Design Principles (CWE-657)

2019-09-03 support@hackerone.com

Information Disclosure Amd Zu11Eg Firmware Zu15Eg Firmware Zu17Eg Firmware Zu19Eg Firmware Zu1Cg Firmware Zu1Eg Firmware Zu21Dr Firmware Zu25Dr Firmware Zu27Dr Firmware Zu28Dr Firmware Zu29Dr Firmware Zu2Cg Firmware Zu2Eg Firmware Zu39Dr Firmware Zu3Cg Firmware Zu3Eg Firmware Zu3Tcg Firmware Zu3Teg Firmware Zu42Dr Firmware Zu43Dr Firmware Zu46Dr Firmware Zu47Dr Firmware Zu48Dr Firmware Zu49Dr Firmware Zu4Cg Firmware Zu4Eg Firmware Zu4Ev Firmware Zu5Cg Firmware Zu5Eg Firmware Zu5Ev Firmware Zu63Dr Firmware Zu64Dr Firmware Zu65Dr Firmware Zu67Dr Firmware Zu6Cg Firmware Zu6Eg Firmware Zu7Cg Firmware Zu7Eg Firmware Zu7Ev Firmware Zu9Cg Firmware Zu9Eg Firmware

5.5

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-657
Impact	CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required.
Exploit ScenarioDerived	Successful exploitation could compromise the medium-severity affected system.

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

A weakness was found in Encrypt Only boot mode in Zynq UltraScale+ devices. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified under CWE-657. A weakness was found in Encrypt Only boot mode in Zynq UltraScale+ devices. This could lead to an adversary being able to modify the control fields of the boot image leading to an incorrect secure boot behavior. Affected products include: Amd Zu11Eg Firmware, Amd Zu15Eg Firmware, Amd Zu17Eg Firmware, Amd Zu19Eg Firmware, Amd Zu1Cg Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

DescriptionNVD

A weakness was found in Encrypt Only boot mode in Zynq UltraScale+ devices. This could lead to an adversary being able to modify the control fields of the boot image leading to an incorrect secure boot behavior.

Threat Intelligence Overview

EPSS Score

0.2%

Top 84% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

GitHub

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: +28

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.