Stack-based Buffer Overflow Vulnerability in Comfast CF-N1-S Web Management
CVE-2026-78050

9.4CRITICAL

Key Information:

Vendor

Comfast

Status
Cf-n1-s
Vendor
CVE Published:
22 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-78050?

A stack-based buffer overflow vulnerability has been identified in the Web Management component of Comfast CF-N1-S 2.6.0.1. The issue occurs within the function sub_41AD7C located in the mbox-config endpoint when handling user input parameters such as timestr and ntp_client_enabled. This vulnerability allows an attacker to exploit it remotely, potentially leading to unauthorized access or control over the device. It is crucial for users of the affected version to apply necessary security measures and updates to mitigate the risk associated with this vulnerability.

Affected Version(s)

CF-N1-S 2.6.0.1

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-2026-78050 - Proof of Concept

References

https://vuldb.com/vuln/394291
vdb-entrytechnical-description
https://vuldb.com/vuln/394291/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-78050
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
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

010hex (VulDB User)
.