CVE-2025-34127 - CVE House

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Status published Critical CVE-2025-34127

Achat v0.150 SEH Buffer Overflow via UDP

9.3 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Peter Kasza

References

Affected Vendor

Achat Software

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Affected Software

Achat Chat Server

Vulnerable Versions:

0.150

Timeline

Official Publish: July 16th, 2025

Last Modified: April 7th, 2026

Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1055 Process Injection

Defense Evasion

T1105 Ingress Tool Transfer

Command and Control

T1485 Data Destruction

T1059 Command and Scripting Interpreter

T1505.003 Web Shell

T1565.002 Stored Data Manipulation