Stack-based Buffer Overflow in Comfast CF-N1-S Web Management
CVE-2026-77148

9.4CRITICAL

Key Information:

Vendor

Comfast

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-77148?

A stack-based buffer overflow vulnerability exists in the Comfast CF-N1-S Web Management interface within the function sub_44B50C of the mbox-config component. This issue can be exploited remotely, allowing attackers to manipulate certain inputs to overflow the stack, potentially leading to arbitrary code execution. As the exploit has been made public, it poses a significant risk to users of version 2.6.0.1, necessitating prompt attention and mitigation measures.

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-2026-77148 - Proof of Concept

References

https://vuldb.com/vuln/393733
vdb-entrytechnical-description
https://vuldb.com/vuln/393733/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-77148
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)
.