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CVE-2021-20146

31
FAUCET Score

CVE-2021-20146 describes a critical vulnerability in GryphonConnect Gryphon Tower and Gryphon Tower Firmware, where an unprotected SSH private key could grant root access to a Gryphon development server hosted on AWS. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

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

9.8CRITICAL

CVSS:3.1/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 Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.99%
Probability of exploitation in next 30 days
EPSS Percentile
78.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0199 is in the 67th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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
Vendor Advisory