CVE-2023-54330

CRITICAL

Inbit Messenger < 4.9.0 - Out-of-Bounds Write

Title source: rule

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.

Exploits (1)

exploitdb WORKING POC

by a-rey · pythonremotewindows

https://www.exploit-db.com/exploits/51126

View Code ZIP pw:eip

References (4)

[Exploit, Third Party Advisory] https://github.com/a-rey/exploits/blob/main/writeups/Inbit_Messenger/v4.6.0/writeup.md

[Product] https://web.archive.org/web/20200122082432/https://www.softsea.com/review/Inbit-Messenger-Basic-Edition.html

[Exploit, Third Party Advisory] https://www.exploit-db.com/exploits/51126

[Third Party Advisory] https://www.vulncheck.com/advisories/inbit-messenger-unauthenticated-remote-seh-overflow

Scores

CVSS v3 9.8

EPSS 0.0038

EPSS Percentile 59.4%

Attack Vector NETWORK

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

Details

CWE

CWE-787 CWE-121

Status published

Products (1)

inbit/inbit_messenger 4.6.0 - 4.9.0

Published Jan 13, 2026

Tracked Since Feb 18, 2026