CVE-2023-54330 json
Inbit Messenger 4.9.0 - Unauthenticated Remote SEH Overflow
published 2026-01-13 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-2588
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 9 mo ago
Exploit prediction
0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- exploit-db.com https://www.exploit-db.com/exploits/51126 referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/a-rey/exploits/blob/main/writeups/Inbit_Messenger/v4.6.0/writeup.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.3 | 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 |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 9.3 | 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 |
Affected products
- Inbit Inbit Messenger
Classification
References
-
exploit-db.com
/exploits/51126
exploit, third-party-advisory
-
github.com
/a-rey/exploits/blob/main/writeups/Inbit_Messenger/v4.6.0/writeup.md
technical-description, exploit, third-party-advisory
-
web.archive.org
/web/20200122082432/https://www.softsea.com/review/Inbit-Messenger-Basic-Edition.html
product
-
vulncheck.com
/advisories/inbit-messenger-unauthenticated-remote-seh-overflow
third-party-advisory
Sources
- CVE List CVE-2023-54330
- NVD CVE-2023-54330
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