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Vulnerability record · CVE-2025-9605 · published 29 August 2025

CVE-2025-9605: Tenda ac21 firmware memory buffer overflow vulnerability

Tenda · Ac21 Firmware

A security vulnerability has been detected in Tenda AC21 and AC23 16.03.08.16. Affected is the function GetParentControlInfo of the file /goform/GetParentControlInfo. Such manipulation of the argument mac leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.

8.9 CVSS 4.0 High EPSS 5.1% · top 7.9% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow
8.9CVSS 4.0 base score, v2 10.0
5.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
9References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

A security vulnerability has been detected in Tenda AC21 and AC23 16.03.08.16. Affected is the function GetParentControlInfo of the file /goform/GetParentControlInfo. Such manipulation of the argument mac leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/XXRicardo/iot-cve/blob/main/Tenda/AC21/AC21V1.0re_V16.03.08.16.md ExploitThird Party Advisory
https://github.com/XXRicardo/iot-cve/blob/main/Tenda/AC23/Stack-Based%20Buffer%20Overflow%20in%20Tenda%20Wi-Fi%205%20Rou ExploitThird Party Advisory
https://vuldb.com/?ctiid.321783 Permissions RequiredVDB Entry
https://vuldb.com/?id.321783 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.636545 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.636548 Third Party AdvisoryVDB Entry
https://www.tenda.com.cn/ Product
https://github.com/XXRicardo/iot-cve/blob/main/Tenda/AC21/AC21V1.0re_V16.03.08.16.md ExploitThird Party Advisory
https://github.com/XXRicardo/iot-cve/blob/main/Tenda/AC23/Stack-Based%20Buffer%20Overflow%20in%20Tenda%20Wi-Fi%205%20Rou ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-40799Tenda ac23 firmware out-of-bounds write vulnerabilityTenda AC23 Vv16.03.07.45_cn is vulnerable to Buffer Overflow via sub_450A4C function.EPSS 0.93%9.8CVE-2023-0782Tenda ac23 firmware out-of-bounds write vulnerabilityA vulnerability was found in Tenda AC23 16.03.07.45 and classified as critical. Affected by this issue is the function formSetSysToolDDNS/formGetSysT…EPSS 1.5%9.8CVE-2022-43107Tenda ac23 firmware out-of-bounds write vulnerabilityTenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the time parameter in the setSmartPowerManagement function.EPSS 0.97%9.8CVE-2022-43108Tenda ac23 firmware out-of-bounds write vulnerabilityTenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the firewallEn parameter in the formSetFirewallCfg function.EPSS 0.97%9.8CVE-2022-43106Tenda ac23 firmware out-of-bounds write vulnerabilityTenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the schedStartTime parameter in the setSchedWifi function.EPSS 0.97%9.8CVE-2022-43104Tenda ac23 firmware out-of-bounds write vulnerabilityTenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the wpapsk_crypto parameter in the fromSetWirelessRepeat function.EPSS 0.97%9.8CVE-2022-43105Tenda ac23 firmware out-of-bounds write vulnerabilityTenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the shareSpeed parameter in the fromSetWifiGusetBasic function.EPSS 0.97%9.8CVE-2022-43103Tenda ac23 firmware out-of-bounds write vulnerabilityTenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the list parameter in the formSetQosBand function.EPSS 0.97%

Source: NIST National Vulnerability Database (record CVE-2025-9605), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.