What is the CVSS score of CVE-2023-54330?

CVE-2023-54330 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.4%.

Which versions of Windows are affected by CVE-2023-54330?

CVE-2023-54330 presents critical security risk, a stack-based buffer overflow vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2023-54330?

Yes, a public proof-of-concept exploit is available for CVE-2023-54330. Prioritise patching immediately. EPSS: 0.4%.

How to fix or mitigate CVE-2023-54330?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Windows CVE-2023-54330

CRITICAL

Stack-based Buffer Overflow (CWE-121)

2026-01-13 disclosure@vulncheck.com

Windows Buffer Overflow Stack Overflow Inbit Messenger

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 30, 2026 - 15:48 vuln.today

Public exploit code

CVE Published

Jan 13, 2026 - 23:16 nvd

CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

Inbit Messenger 4.6.0-4.9.0 has a second stack buffer overflow in the network handler. SEH overwrite leads to shellcode execution on Windows. PoC available.

Technical ContextAI

Malformed network packets overflow a stack buffer (CWE-121), overwriting the Structured Exception Handler chain for code execution.

RemediationAI

Update Inbit Messenger.

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CVE-2023-54330 vulnerability details – vuln.today

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Windows CVE-2023-54330

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

More from same product – last 7 days

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External POC / Exploit Code