CVE-2025-34127
Critical
Description
A stack-based buffer overflow exists in Achat v0.150 in its default configuration. By sending a specially crafted message to the UDP port 9256, an attacker can overwrite the structured exception handler (SEH) due to insufficient bounds checking on user-supplied input leading to remote code execution.
SeverityCritical
CVSS9.3
Exploit probability—
ProductAchat Chat Server
PublishedJul 16, 2025
First seenJul 16, 2025
Weakness typeCWE-121CWE-121CWE-94Code injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Achat Software Achat Chat Server | 0.150 | — |
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