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CVE-2023-47304

21
FAUCET Score

CVE-2023-47304 is a high-severity vulnerability affecting the Vonage Box Telephone Adapter VDV23 (firmware VDV21-3.2.11-0.5.1). This flaw allows a local attacker to bypass UART authentication, enabling arbitrary read/write access to the device's memory. With a CVSS score of 7.8, this vulnerability poses a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
vdv21-3.2.11-0.5.1CPE matchmatch criteria
cpe:2.3:o:vonage:vdv23_firmware:vdv21-3.2.11-0.5.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
20.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 57th percentile among its peer group of 16,994 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 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

Remediation records are not available for this CVE.

References

trojanhorsey.substack.com / p/cve-2023-47304-unsecured-uart-in
Exploit