Heap Out-of-Bounds Read Vulnerability in Unshield by TwoGood
CVE-2026-110716

6.8MEDIUM

Key Information:

Vendor

Twogood

Status
Unshield
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-110716?

Unshield, a tool developed by TwoGood, is susceptible to a heap out-of-bounds read vulnerability present in versions up to 1.6.2. This flaw is triggered by the unshield_get_file_table() function when it processes unchecked cabinet header offsets, potentially allowing attackers to read beyond allocated heap memory. By crafting a malicious InstallShield cabinet file with out-of-range file_table_offset values or excessive file counts, attackers can exploit this vulnerability to crash the Unshield tool or any applications that utilize its library. This could lead to service disruptions or unauthorized access to memory contents.

Affected Version(s)

unshield 0 <= 1.6.2

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-2026-110716 - Proof of Concept

References

https://hackmd.io/@haind-pwn/unshield-header-filetable-oo...
technical-descriptionexploit
https://github.com/twogood/unshield/blob/51de441ba6893f11...
technical-description
https://github.com/twogood/unshield
product

CVSS V4

Score:
6.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

HaiND from the Post and Telecommunication Institute of Technology
.