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CVE-2021-20121

17
FAUCET Score

CVE-2021-20121 describes an authenticated arbitrary file read vulnerability affecting the Telus Wi-Fi Hub (PRV65B444A-S-TS) with firmware version 3.00.20. An attacker with physical access and authenticated credentials can read arbitrary files by connecting a specially prepared USB drive and sending crafted web interface requests. This vulnerability has a CVSS score of 4.0 (Medium), indicating a low privilege requirement, high attack complexity, and high confidentiality impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.00.20CPE matchmatch criteria
cpe:2.3:o:telus:prv65b444a-s-ts_firmware:3.00.20:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.0MEDIUM

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 Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
0.4
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 90th percentile among its peer group of 22 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.0 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (5)

asteriskvendor investigatingvia llm_extracted
ciscovendor investigatingvia llm_extracted
miniovendor investigatingvia llm_extracted
opensshvendor investigatingvia llm_extracted
railsvendor investigatingvia llm_extracted

Vendor Advisories (5)

opensshllm-openssh-faaf45dda636f8aeMEDIUM

Multiple Vulnerabilities in Telus Wi-Fi Hub

Oct 11, 2021
railsllm-rails-7adf3bbe1cbbb343MEDIUM

Multiple Vulnerabilities in Telus Wi-Fi Hub

Oct 11, 2021
miniollm-minio-80cec2121dbb28f6MEDIUM

Multiple Vulnerabilities in Telus Wi-Fi Hub

Oct 11, 2021
ciscollm-cisco-647685b207c7a425MEDIUM

Multiple Vulnerabilities in Telus Wi-Fi Hub

Oct 11, 2021
asteriskllm-asterisk-d72e0969ff5d1738MEDIUM

Multiple Vulnerabilities in Telus Wi-Fi Hub

Oct 11, 2021

References

tenable.com / security/research/tra-2021-41
ExploitThird Party Advisory