CVE-2020-37025CWE-120

Port Forwarding Wizard 4.8.0 - Buffer Overflow

High · published January 30, 2026

CVSS v4.0
8.4
EPSS
0%
Percentile
7.5
In the wild
Unconfirmed
What it is

⚡ A crafty buffer overflow in Port Forwarding Wizard 4.8.0 can let local attackers run amok with arbitrary code execution! Imagine a digital magician pulling a rabbit out of a hat, but the hat contains your sensitive data instead! 🎩✨ Think of the buffer overflow as a crowded restaurant where someone keeps pushing in more and more diners at the same table until the whole setup collapses. The Register feature gets overwhelmed, allowing an attacker to slip in a malicious payload and potentially take control of the entire operation. In this scenario, an attacker could execute arbitrary code on vulnerable Windows systems, leading to a catastrophic breach of security. They could install malware, steal sensitive information, or even manipulate system controls, which could be absolutely devastating for users in a vulnerable environment.

Put simply

Think of the buffer overflow as a crowded restaurant where someone keeps pushing in more and more diners at the same table until the whole setup collapses. The Register feature gets overwhelmed, allowing an attacker to slip in a malicious payload and potentially take control of the entire operation. This vulnerability arises from a buffer overflow in the Register feature of Port Forwarding Wizard 4.8.0, where an overly long request allows local attackers to overwrite important data structures, including SEH handlers, thereby executing arbitrary shellcode at will.

What to do

In this scenario, an attacker could execute arbitrary code on vulnerable Windows systems, leading to a catastrophic breach of security. They could install malware, steal sensitive information, or even manipulate system controls, which could be absolutely devastating for users in a vulnerable environment. To protect against this vulnerability, immediately upgrade Port Forwarding Wizard to version 4.8.1 or later. Additionally, implement strict input validation on requests to the Register feature and monitor your system for any suspicious activity. You've got this! Follow these steps, and you'll have your defenses fortified in no time. 🛡️

The record
Technical detail
CVSS v4.0
8.4 · HIGH
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00183 · 7.5th percentile
Weakness
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Published
2026-01-30T22:07Z
EPSS history
Timeline
  • 30 JAN 22:07Z
    Port Forwarding Wizard 4.8.0 - Buffer Overflow
    cvelistv5