Critical Severity Vulnerability
This vulnerability has been rated as Critical severity. Immediate action is recommended.
CVE-2023-54330
Critical
Low
Medium
High
Critical
9.8
CVSS Score
Published: Jan 13, 2026
Last Modified: Jan 14, 2026
Vulnerability Description
Inbit Messenger versions 4.6.0 to 4.9.0 contain a remote stack-based buffer overflow vulnerability that allows unauthenticated attackers to execute arbitrary code by sending malformed network packets. Attackers can craft a specially designed payload targeting the messenger's network handler to overwrite the Structured Exception Handler (SEH) and execute shellcode on vulnerable Windows systems.
CVSS Metrics
Common Vulnerability Scoring System
Vector String:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
N
Attack Complexity
L
Privileges Required
N
User Interaction
N
Scope
U
Confidentiality
H
Integrity
H
Availability
H
References & Resources
-
https://github.com/a-rey/exploits/blob/main/writeups/Inbit_Messenger/v4.6.0/writeup.mddisclosure@vulncheck.com
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https://web.archive.org/web/20200122082432/https://www.softsea.com/review/Inbit-Messenger-Basic-Edition.htmldisclosure@vulncheck.com
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https://www.exploit-db.com/exploits/51126disclosure@vulncheck.com
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https://www.vulncheck.com/advisories/inbit-messenger-unauthenticated-remote-seh-overflowdisclosure@vulncheck.com
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https://github.com/a-rey/exploits/blob/main/writeups/Inbit_Messenger/v4.6.0/writeup.md134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity Details
9.8
out of 10.0
Critical
Key Information
- Published Date
- January 13, 2026
