Heap Out-of-Bounds Read Vulnerability in miniupnpc by MiniUPnP
CVE-2026-110656

2.3LOW

Key Information:

Vendor

Miniupnp Project

Status
Miniupnpc
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-110656?

The miniupnpc library, up to version 2.3.3, is susceptible to a heap out-of-bounds read issue in the minixml parseelt function. This vulnerability occurs due to insufficient buffer checks when processing namespace prefixes, allowing a malicious or spoofed Universal Plug and Play (UPnP) gateway on the local network to send a deceptive device description or SOAP reply. If crafted properly, such a message can lead to a crash of the client device, posing a significant risk to network stability and security.

Affected Version(s)

miniupnpc 0 <= 2.3.3

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-2026-110656 - Proof of Concept

References

https://hackmd.io/@haind-pwn/miniupnpc-minixml-oob-read
technical-descriptionexploit
https://github.com/miniupnp/miniupnp/blob/bf4215a7574f88a...
technical-description
https://github.com/miniupnp/miniupnp/commit/64ef08a12aaba...
patch

CVSS V4

Score:
2.3
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Adjacent Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

HaiND from the Post and Telecommunication Institute of Technology
.