What is the CVSS score of CVE-2020-1879?

CVE-2020-1879 has a CVSS 3.1 base score of 3.9 (Low). CVSS vector: CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.1%.

Osca 550 Firmware CVE-2020-1879

LOW

Improper Validation of Integrity Check Value (CWE-354)

2020-03-20 psirt@huawei.com

Information Disclosure Huawei Osca 550 Firmware Osca 550A Firmware Osca 550Ax Firmware Osca 550X Firmware Hege 560 Firmware Hege 570 Firmware

3.9

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-354 OWASP Top 10:2025 A08:2025 - Software or Data Integrity Failures ASVS 5.0 V15 - Secure Coding and Architecture Integrity verification
Impact	CVSS score of 3.9 (LOW). Attack characteristics: physical attack vector, low complexity, high privileges required, no user interaction not required.
Exploit ScenarioDerived	Successful exploitation could compromise the low-severity affected system.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAI

There is an improper integrity checking vulnerability on some huawei products. Rated low severity (CVSS 3.9), 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-354. There is an improper integrity checking vulnerability on some huawei products. The software of the affected product has an improper integrity check which may allow an attacker with high privilege to make malicious modifications.Affected product versions include:HEGE-560 versions 1.0.1.21(SP3);HEGE-570 versions 1.0.1.22(SP3);OSCA-550 versions 1.0.1.21(SP3);OSCA-550A versions 1.0.1.21(SP3);OSCA-550AX versions 1.0.1.21(SP3);OSCA-550X versions 1.0.1.21(SP3). Affected products include: Huawei Hege-560 Firmware, Huawei Hege-570 Firmware, Huawei Osca-550 Firmware, Huawei Osca-550A Firmware, Huawei Osca-550Ax Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 3.9 LOW

AV:P/AC:L/PR:H/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

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

DescriptionNVD

There is an improper integrity checking vulnerability on some huawei products. The software of the affected product has an improper integrity check which may allow an attacker with high privilege to make malicious modifications.Affected product versions include:HEGE-560 versions 1.0.1.21(SP3);HEGE-570 versions 1.0.1.22(SP3);OSCA-550 versions 1.0.1.21(SP3);OSCA-550A versions 1.0.1.21(SP3);OSCA-550AX versions 1.0.1.21(SP3);OSCA-550X versions 1.0.1.21(SP3).

Threat Intelligence Overview

EPSS Score

0.1%

Top 96% 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 LOW

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

LOW severity (CVSS 0.1-3.9)

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

Low

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +20

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.