CVE-2026-123966— Tenda AC19 saveParentControlInfo heap-based overflow

Quick assessment

Affected

Tenda AC19

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tenda AC19 固件版本 16.03.10.07 中存在一个漏洞。该漏洞影响文件中的函数。通过对参数进行恶意操纵，可触发基于堆的缓冲区溢出。该攻击可远程实施。相关利用代码已在公开渠道披露，可能被攻击者利用。

CVSS 10.0 · Critical Updated Nov 07, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Tenda AC19 saveParentControlInfo heap-based overflow

Source: CVE Program / CVE List V5

Vulnerability Description

A vulnerability was determined in Tenda AC19 16.03.10.07. Affected by this issue is the function saveParentControlInfo of the file /goform/saveParentControlInfo. This manipulation of the argument deviceId causes heap-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

堆缓冲区溢出

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Tenda	AC19	16.03.10.07	`cpe:2.3:h:tenda:ac19::::::::`

II. Public POCs for CVE-2026-123966

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-123966

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Other References for CVE-2026-123966 (5)

https://github.com/Tmzop/Tenda-AC19-saveParentControlInfo/blob/main/report.md exploit
https://vuldb.com/cve/CVE-2026-123966 third-party-advisory
https://vuldb.com/vuln/432038/cti signature permissions-required
https://vuldb.com/vuln/432038 vdb-entry technical-description
https://vuldb.com/submit/1035173 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-123966

IV. Related Vulnerabilities

Same product: AC19

CVE-2026-113744
Tenda AC19 httpd Web Management Service SetFirewallCfg formS

Same vendor: Tenda

Same weakness: CWE-122