Read the docs
TI-2023-30604 Aliases CVE-2023-54330GHSA-hj52-rqmp-xwx6

Inbit Messenger 4.9.0 - Unauthenticated Remote SEH Overflow

Priority HIGH 81CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00807 57th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
InbitInbit Messenger4.6.0 – 4.9.0—No fix listedCNA
  • Inbit Messenger VendorInbit Affected 4.6.0 – 4.9.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:inbit:inbit_messenger:*:*:*:*:*:*:*:*4.6.0 – 4.9.0VulnerableInbit
  • cpe:2.3:a:inbit:inbit_messenger:*:*:*:*:*:*:*:* Versions 4.6.0 – 4.9.0 Vulnerable ·Inbit

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-54330
  2. 2026-10-03 Alias added: GHSA-hj52-rqmp-xwx6

References

Exploit 2

Other 1

  • TI-2023-30603 Inbit Messenger 4.9.0 - Unauthenticated Remote Command Execution (RCE) CVSS 4.0CRITICAL 9.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences