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CVE-2021-20145

25
FAUCET Score

CVE-2021-20145 describes an unprotected OpenVPN configuration file vulnerability in Gryphon Tower routers, impacting both the Gryphon Tower and its firmware. This flaw allows attackers to access the Gryphon Homebound VPN network, exposing other users' LAN interfaces. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low complexity, potentially leading to high confidentiality impact by allowing attackers to make configuration changes or launch attacks as if on an adjacent network. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 04.0004.12CPE matchmatch criteria
cpe:2.3:o:gryphonconnect:gryphon_tower_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.24%
Probability of exploitation in next 30 days
EPSS Percentile
66.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0124 is in the 45th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

giteavendor investigatingvia llm_extracted
opensshvendor investigatingvia llm_extracted
railsvendor investigatingvia llm_extracted

Vendor Advisories (3)

opensshllm-openssh-673dfebe8517c769CRITICAL

Multiple Vulnerabilities in Gryphon Tower Router

Dec 7, 2021
giteallm-gitea-1cc4697638d33921CRITICAL

Multiple Vulnerabilities in Gryphon Tower Router

Dec 7, 2021
railsllm-rails-a3fab0411404ce49CRITICAL

Multiple Vulnerabilities in Gryphon Tower Router

Dec 7, 2021

References

tenable.com / security/research/tra-2021-51
ExploitVendor Advisory