CVE-2023-54330

Inbit Messenger 4.9.0 - Unauthenticated Remote SEH Overflow

Published Jan 13, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Yahoo
Yahoo messenger
CPEs cpe:2.3:a:yahoo:messenger:*:*:*:*:*:*:*:*
Vendors & Products Yahoo
Yahoo messenger
Type Values Removed Values Added
Weaknesses CWE-787
CPEs cpe:2.3:a:inbit:inbit_messenger:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Inbit
Inbit inbit Messenger
Vendors & Products Inbit
Inbit inbit Messenger
Type Values Removed Values Added
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.
Title Inbit Messenger 4.9.0 - Unauthenticated Remote SEH Overflow
Weaknesses CWE-121
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Mar 5, 2026, 1:29 AM
Reserved
Jan 10, 2026, 1:51 AM
Status
Analyzed
Published
Jan 13, 2026, 11:16 PM
Modified
Jun 17, 2026, 6:47 AM