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CVE-2023-54330

30
FAUCET Score

CVE-2023-54330 is a critical remote stack-based buffer overflow vulnerability affecting Inbit Messenger versions 4.6.0 to 4.9.0. Unauthenticated attackers can exploit this by sending specially crafted network packets to execute arbitrary code and achieve full system compromise on vulnerable Windows systems. With a CVSS score of 9.8 (CRITICAL) and a FAUCET Risk Score of 92/100, this vulnerability presents a significant risk due to its network-based attack vector and lack of user interaction. While no public exploits or active exploitation have been observed, and community discussion is minimal, the potential for severe impact warrants immediate attention.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.6.0, <= 4.9.0CPE matchmatch criteria
cpe:2.3:a:inbit:inbit_messenger:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

9.3CRITICAL

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.68%
Probability of exploitation in next 30 days
EPSS Percentile
48.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0068 is in the 30th percentile among its peer group of 36,862 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

Remediation records are not available for this CVE.

References

github.com / a-rey/exploits/blob/main/writeups/Inbit_Messenger/v4.6.0/writeup.md
ExploitThird Party Advisory
web.archive.org / web/20200122082432/https://www.softsea.com/review/Inbit-Messenger-Basic-Edition.html
Product
exploit-db.com / exploits/51126
ExploitThird Party Advisory
vulncheck.com / advisories/inbit-messenger-unauthenticated-remote-seh-overflow
Third Party Advisory