Stack-Based Buffer Overflow in Tenda AC19 Web Management Service
CVE-2026-113744

10CRITICAL

Key Information:

Vendor

Tenda
Status
Ac19
Vendor
CVE Published:
21 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-113744?

A security vulnerability has been identified in the Tenda AC19, specifically within the formSetFirewallCfg function of the httpd Web Management Service. The vulnerability can be exploited through manipulation of the firewallEn argument, leading to a stack-based buffer overflow. This flaw allows for remote exploitation, which poses significant risks to the integrity and security of the device. Given that the exploit has been publicly disclosed, immediate action is recommended for users to mitigate potential threats.

Affected Version(s)

AC19 16.03.10.07

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-2026-113744 - Proof of Concept

References

https://vuldb.com/vuln/422925
vdb-entrytechnical-description
https://vuldb.com/vuln/422925/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-113744
third-party-advisory

CVSS V4

Score:
10
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

Zeming Hu (VulDB User)
.