FlexHEX 2.71 contains a local buffer overflow vulnerability in the Stream Name field that allows local attackers to execute arbitrary code by triggering a structured exception handler (SEH) overflow. Attackers can craft a malicious text file with carefully aligned shellcode and SEH chain pointers, paste the contents into the Stream Name dialog, and execute arbitrary commands like calc.exe when the exception handler is triggered.
History

Wed, 25 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Flexhex
Flexhex flexhex
Vendors & Products Flexhex
Flexhex flexhex

Tue, 24 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 24 Mar 2026 11:45:00 +0000

Type Values Removed Values Added
Description FlexHEX 2.71 contains a local buffer overflow vulnerability in the Stream Name field that allows local attackers to execute arbitrary code by triggering a structured exception handler (SEH) overflow. Attackers can craft a malicious text file with carefully aligned shellcode and SEH chain pointers, paste the contents into the Stream Name dialog, and execute arbitrary commands like calc.exe when the exception handler is triggered.
Title FlexHEX 2.71 Local Buffer Overflow via SEH Unicode
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 8.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-03-24T11:27:02.248Z

Updated: 2026-03-24T13:15:20.448Z

Reserved: 2026-03-24T10:59:43.113Z

Link: CVE-2019-25627

cve-icon Vulnrichment

Updated: 2026-03-24T13:15:16.254Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-24T12:16:02.560

Modified: 2026-03-24T15:53:48.067

Link: CVE-2019-25627

cve-icon Redhat

No data.