What’s Vulnerable › Vulnerabilities

CVE-2025-34127: Achat v0.150 SEH Buffer Overflow via UDP

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-16 · updated 2026-06-17
• Weakness: CWE-94

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.

Affected products

• Achat Software Achat Chat Server: 0.150

References

• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/misc/achat_bof.rb
• https://www.exploit-db.com/exploits/36056
• https://www.vulncheck.com/advisories/achat-seh-buffer-overflow

Get alerted when CVE-2025-34127 or the next vulnerability affects your stack