CVE-2019-25627

HIGH

FlexHEX 2.71 Local Buffer Overflow via SEH Unicode

Title source: cna
STIX 2.1

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.

Exploits (1)

exploitdb WORKING POC
by Chris Au · pythonlocalwindows
https://www.exploit-db.com/exploits/46665

Scores

CVSS v3 8.4
EPSS 0.0001
EPSS Percentile 0.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-434
Status published
Products (2)
flexhex/flexhex 2.71
Flexhex/FlexHEX 2.71
Published Mar 24, 2026
Tracked Since Mar 24, 2026