Vulnerability · Published Jan 13, 2026 · Assigned by VulnCheck

CVE-2023-54329Inbit Messenger 4.9.0 - Unauthenticated Remote Command Execution (RCE)

Critical 9.8

In plain English

A critical-severity stack buffer overflow in Inbit Messenger from Inbit. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)1.2%top 31.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Inbit Messenger 4.6.0 - 4.9.0 contains a remote command execution vulnerability that allows unauthenticated attackers to execute arbitrary commands by exploiting a stack overflow in the messenger's protocol. Attackers can send specially crafted XML packets to port 10883 with a malicious payload to trigger the vulnerability and execute commands with system privileges.

Affected products (as reported)

Vendor	Product	Versions
Inbit	Inbit Messenger	4.6.0 – through 4.9.0

Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

ExploitDB-51127 exploit
Archived Software Download Page product
Exploit Write-Up technical-description
VulnCheck Advisory: Inbit Messenger 4.9.0 - Unauthenticated Remote Command Execution (RCE) third-party-advisory