What is the CVSS score of CVE-2018-20387?

CVE-2018-20387 has a CVSS 3.0 base score of 9.8 (Critical). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.5%.

Is there a public PoC exploit available for CVE-2018-20387?

Yes, a public proof-of-concept exploit is available for CVE-2018-20387. Prioritise patching immediately. EPSS: 1.5%.

Bcw700J Firmware CVE-2018-20387

CRITICAL

Insufficiently Protected Credentials (CWE-522)

2018-12-23 cve@mitre.org

Information Disclosure Bcw700J Firmware Bcw710J Firmware Bcw710J2 Firmware

9.8

CVSS 3.0 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Dec 23, 2018 - 21:29 nvd

CRITICAL 9.8

DescriptionNVD

AnalysisAI

Bnmux BCW700J 5.20.7, BCW710J 5.30.6a, and BCW710J2 5.30.16 devices allow remote attackers to discover credentials via iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 SNMP. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Insufficiently Protected Credentials (CWE-522), which allows attackers to obtain user credentials due to weak protection mechanisms. Bnmux BCW700J 5.20.7, BCW710J 5.30.6a, and BCW710J2 5.30.16 devices allow remote attackers to discover credentials via iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 SNMP requests. Affected products include: Bnmux Bcw700J Firmware, Bnmux Bcw710J Firmware, Bnmux Bcw710J2 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Hash passwords with strong algorithms (bcrypt, argon2), encrypt credentials in transit and at rest, never log credentials.