CVE-2023-54330
Inbit Messenger 4.9.0 - Unauthenticated Remote SEH Overflow
CRITICAL 9.3EPSS 0.8%
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.
- Affected
- Inbit · Inbit Messenger
- CVSS v4.0 VULNCHECK
- 9.3 CRITICAL
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 - CVSS v3.1 VULNCHECK
- 9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.81% chance of exploitation in the next 30 days, 56th percentile
- Published
- 2026-01-13
- Updated
- 2026-03-05
Proof-of-concept exploits (2)
- https://www.exploit-db.com/exploits/51126
- a-rey/exploits/blob/main/writeups/Inbit_Messenger/v4.6.0/writeup.md3★ · 2022-11-09
Security advisories
- https://www.vulncheck.com/advisories/inbit-messenger-unauthenticated-remote-seh-overflow
- https://web.archive.org/web/20200122082432/https://www.softsea.com/review/Inbit-Messenger…