What is the CVSS score of CVE-2021-20121?

CVE-2021-20121 has a CVSS 3.1 base score of 4.0 (Medium). CVSS vector: CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.5%.

Is there a public PoC exploit available for CVE-2021-20121?

Yes, a public proof-of-concept exploit is available for CVE-2021-20121. Prioritise patching immediately. EPSS: 0.5%.

Prv65B444A S Ts Firmware CVE-2021-20121

MEDIUM

2021-10-11 vulnreport@tenable.com

Information Disclosure Prv65B444A S Ts Firmware

4.0

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.0 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Physical

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Oct 11, 2021 - 17:15 nvd

MEDIUM 4.0

DescriptionNVD

The Telus Wi-Fi Hub (PRV65B444A-S-TS) with firmware version 3.00.20 is vulnerable to an authenticated arbitrary file read. An authenticated user with physical access to the device can read arbitrary files from the device by preparing and connecting a specially prepared USB drive to the device, and making a series of crafted requests to the device's web interface.

AnalysisAI

The Telus Wi-Fi Hub (PRV65B444A-S-TS) with firmware version 3.00.20 is vulnerable to an authenticated arbitrary file read. Rated medium severity (CVSS 4.0). Public exploit code available and no vendor patch available.

Technical ContextAI

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.