Vulnerability · Published Oct 21, 2026 · Assigned by VulDB

CVE-2026-113744Tenda AC19 httpd Web Management Service SetFirewallCfg formSetFirewallCfg stack-based overflow

Critical 10.0

In plain English

A critical-severity stack buffer overflow in AC19 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)0.6%top 50.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A security vulnerability has been detected in Tenda AC19 16.03.10.07. The impacted element is the function formSetFirewallCfg of the file /goform/SetFirewallCfg of the component httpd Web Management Service. Such manipulation of the argument firewallEn leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed publicly and may be used.

Affected products (as reported)

Vendor	Product	Versions
Tenda	AC19	16.03.10.07

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-422925 | Tenda AC19 httpd Web Management Service SetFirewallCfg formSetFirewallCfg stack-based overflow vdb-entry, technical-description
VDB-422925 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-113744 | CVE Analysis and Report third-party-advisory
Submit #1018542 | Tenda AC19 V16.03.10.07 Stack-based Buffer Overflow third-party-advisory
https://github.com/henrythekingofuk/TendaCVE exploit
https://www.tenda.com.cn/ product