Local Buffer Overflow in FlexHEX 2.71 by FlexHEX Technology
CVE-2019-25627

8.6HIGH

Key Information:

Vendor

Flexhex

Status
Flexhex
Vendor
CVE Published:
24 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25627?

FlexHEX 2.71 has a local buffer overflow vulnerability in the Stream Name field, allowing local attackers to exploit it by triggering a structured exception handler (SEH) overflow. By crafting a specially formatted text file that includes aligned shellcode and SEH chain pointers, attackers can execute arbitrary commands, such as launching calc.exe. This vulnerability poses a risk as it enables potential unauthorized access to the system's environment.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

FlexHEX 2.71

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25627 - Proof of Concept

References

https://www.exploit-db.com/exploits/46665
exploit
http://www.flexhex.com
product
http://www.flexhex.com/download/flexhex_setup.exe
product

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Chris Au
JSON
.