What is the CVSS score of CVE-2019-5291?

CVE-2019-5291 has a CVSS 3.1 base score of 5.9 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.4%.

S6700 Firmware CVE-2019-5291

MEDIUM

Insufficient Verification of Data Authenticity (CWE-345)

2019-12-13 psirt@huawei.com

Information Disclosure Huawei S6700 Firmware Ar3200 Firmware Cloudengine 12800 Firmware Ar200 Firmware Ar1200 Firmware Ar2200 Firmware Ar120 S Firmware Ar1200 S Firmware Ar150 Firmware Ar150 S Firmware Ar160 Firmware Ar200 S Firmware Ar2200 S Firmware Netengine16Ex Firmware Srg1300 Firmware Srg2300 Firmware Srg3300 Firmware Ar3600 Firmware

5.9

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-345 OWASP Top 10:2025 A08:2025 - Software or Data Integrity Failures ASVS 5.0 V15 - Secure Coding and Architecture Data authenticity verification
Impact	CVSS score of 5.9 (MEDIUM). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. 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 0.4% exploitation probability (EPSS)

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AnalysisAI

Some Huawei products have an insufficient verification of data authenticity vulnerability. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. 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.

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Technical ContextAI · show details

This vulnerability is classified under CWE-345. Some Huawei products have an insufficient verification of data authenticity vulnerability. A remote, unauthenticated attacker has to intercept specific packets between two devices, modify the packets, and send the modified packets to the peer device. Due to insufficient verification of some fields in the packets, an attacker may exploit the vulnerability to cause the target device to be abnormal. Affected products include: Huawei Ar120-S Firmware, Huawei Ar1200 Firmware, Huawei Ar1200-S Firmware, Huawei Ar150 Firmware, Huawei Ar150-S Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.9 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionNVD

Some Huawei products have an insufficient verification of data authenticity vulnerability. A remote, unauthenticated attacker has to intercept specific packets between two devices, modify the packets, and send the modified packets to the peer device. Due to insufficient verification of some fields in the packets, an attacker may exploit the vulnerability to cause the target device to be abnormal.

Threat Intelligence Overview

EPSS Score

0.4%

Top 72% 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 0.4%

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

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +30

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.

Affected Products (CPE)NVD

cpe:2.3:o:huawei:ar120-s_firmware:v200r005c20:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar120-s_firmware:v200r006c10:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar120-s_firmware:v200r007c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar120-s_firmware:v200r008c50:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar1200_firmware:v200r005c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar1200_firmware:v200r006c10:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar1200_firmware:v200r007c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar1200_firmware:v200r008c50:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar1200-s_firmware:v200r005c20:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar1200-s_firmware:v200r006c10:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar1200-s_firmware:v200r007c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar1200-s_firmware:v200r008c50:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar150_firmware:v200r005c20:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar150_firmware:v200r006c10:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar150_firmware:v200r007c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar150_firmware:v200r008c50:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar150-s_firmware:v200r005c20:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar150-s_firmware:v200r006c10:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar150-s_firmware:v200r007c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ar150-s_firmware:v200r008c50:*:*:*:*:*:*:*

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References

Advisories & patches

ADVISORY http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191204-01-validation-en

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GitHub PoC

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