{"id":"CVE-2025-34127","aliases":["EUVD-2025-21744","GHSA-pfrw-7rxm-j92h"],"status":"published","title":"Achat v0.150 SEH Buffer Overflow via UDP","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.","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01878,"percentile":0.79603,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-121","CWE-94"],"published":"2025-07-16T21:10:22Z","modified":"2026-06-17T09:13:30Z","exploits":[{"source":"metasploit","id":"exploit/windows/misc/achat_bof","title":"Achat Unicode SEH Buffer Overflow","type":"exploit","platform":"Windows","date":"2014-12-18","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/windows/misc/achat_bof"}],"products":[{"vendor":"achat software","product":"achat chat server"}],"references":[{"url":"https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/misc/achat_bof.rb","tags":["exploit"]},{"url":"https://www.vulncheck.com/advisories/achat-seh-buffer-overflow","tags":["third-party-advisory"]},{"url":"https://www.exploit-db.com/exploits/36056","tags":["exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-34127"},{"url":"https://github.com/advisories/GHSA-pfrw-7rxm-j92h"}],"sources":{"cve":[{"id":"CVE-2025-34127","title":"Achat v0.150 SEH Buffer Overflow via UDP","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.","status":"published","published":"2025-07-16T21:10:22.494Z","modified":"2026-04-07T14:09:47.085Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"}],"cwes":["CWE-121","CWE-94"],"updated_at":"2026-11-02T14:32:54.1527Z"}],"euvd":[{"id":"EUVD-2025-21744","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.","status":"published","published":"2025-07-16T21:10:22Z","modified":"2026-04-07T14:09:47Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T19:25:12.908169Z"}],"ghsa":[{"id":"GHSA-pfrw-7rxm-j92h","title":"A stack-based buffer overflow exists in Achat v0.150 in its default configuration. By sending a...","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.","status":"published","published":"2025-07-17T00:31:26Z","modified":"2025-07-17T00:31:33Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:03:02.777682Z"}],"nvd":[{"id":"CVE-2025-34127","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.","status":"published","published":"2025-07-16T22:15:24.28Z","modified":"2026-06-17T09:13:30.917Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"}],"cwes":["CWE-94","CWE-121"],"updated_at":"2026-11-02T14:11:18.782156Z"}]}}