CVE-2023-54330

CRITICAL
2026-01-13 [email protected]
9.8
CVSS 3.1
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CVSS Vector

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
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 30, 2026 - 15:48 vuln.today
Public exploit code
CVE Published
Jan 13, 2026 - 23:16 nvd
CRITICAL 9.8

Tags

Windows Buffer Overflow Stack Overflow Inbit Messenger

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.

Analysis

Inbit Messenger 4.6.0-4.9.0 has a second stack buffer overflow in the network handler. SEH overwrite leads to shellcode execution on Windows. PoC available.

Technical Context

Malformed network packets overflow a stack buffer (CWE-121), overwriting the Structured Exception Handler chain for code execution.

Affected Products

Inbit Messenger 4.6.0-4.9.0

Remediation

Update Inbit Messenger.

Priority Score

69
Low Medium High Critical
KEV: 0
EPSS: +0.4
CVSS: +49
POC: +20

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CVE-2023-54330 vulnerability details – vuln.today
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