How severe is CVE-2023-54330?

CVE-2023-54330 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-54330 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-54330?

CVE-2023-54330 affects Inbit Inbit Messenger. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-54330?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2023-54330 have an EU (EUVD) identifier?

Yes. CVE-2023-54330 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2588.

When was CVE-2023-54330 published?

CVE-2023-54330 was published on 2026-01-13 and last updated on 2026-06-17.

CVE-2023-54330

CVE-2023-54330 is a critical-severity vulnerability in Inbit Inbit Messenger with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2588
Weakness: CWE-787
Affected product: Inbit Inbit Messenger
Published: 2026-01-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-54330?: 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.
How severe is CVE-2023-54330?: CVE-2023-54330 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-54330 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-54330?: CVE-2023-54330 affects Inbit Inbit Messenger. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-54330?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2023-54330 have an EU (EUVD) identifier?: Yes. CVE-2023-54330 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2588.
When was CVE-2023-54330 published?: CVE-2023-54330 was published on 2026-01-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:inbit:inbit_messenger:*:*:*:*:*:*:*:*

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