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Vulnerability record · CVE-2026-4974 · published 27 March 2026

CVE-2026-4974: Tenda ac7 firmware memory buffer overflow vulnerability

Tenda · Ac7 Firmware

A flaw has been found in Tenda AC7 15.03.06.44. Affected by this issue is the function fromSetSysTime of the file /goform/SetSysTimeCfg of the component POST Request Handler. Executing a manipulation of the argument Time can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.

7.4 CVSS 4.0 High EPSS 1.0% · top 38.4% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow
7.4CVSS 4.0 base score, v2 9.0
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

A flaw has been found in Tenda AC7 15.03.06.44. Affected by this issue is the function fromSetSysTime of the file /goform/SetSysTimeCfg of the component POST Request Handler. Executing a manipulation of the argument Time can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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

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

References

LinkTags
https://lavender-bicycle-a5a.notion.site/Tenda-AC7-fromSetSysTime-32153a41781f801c95b0f8a53eaa9a1f?source=copy_link ExploitThird Party Advisory
https://vuldb.com/?ctiid.353861 Permissions RequiredVDB Entry
https://vuldb.com/?id.353861 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.778207 Third Party AdvisoryVDB Entry
https://www.tenda.com.cn/ Product

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Related vulnerabilities

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

9.8CVE-2018-14558Tenda AC7, AC9 and AC10 routers command injection via setUsbUnloadTenda AC7, AC9 and AC10 router firmware contains an OS command injection flaw in the formsetUsbUnload function, which passes untrusted input from a c…KEVEPSS 8.7%analysed9.8CVE-2026-51846Tenda ac7 firmware stack-based buffer overflow vulnerabilityIn Tenda AC7 v15.03.06.44, the wanSpeed parameter of the route /goform/AdvSetMacMtuWan has a stack buffer overflow vulnerability that can lead to rem…EPSS 0.85%9.8CVE-2026-51843Tenda ac7 firmware stack-based buffer overflow vulnerabilityTenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the wanMTU parameter.EPSS 0.56%9.8CVE-2026-51844Tenda ac7 firmware stack-based buffer overflow vulnerabilityTenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the cloneType parameter.EPSS 0.56%9.8CVE-2026-51845Tenda ac7 firmware stack-based buffer overflow vulnerabilityTenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the mac parameter.EPSS 0.56%9.8CVE-2025-29135Tenda ac7 firmware stack-based buffer overflow vulnerabilityA stack-based buffer overflow vulnerability in Tenda AC7 V15.03.06.44 allows a remote attacker to execute arbitrary code through a stack overflow att…EPSS 1.1%9.8CVE-2025-29137Tenda ac7 firmware classic buffer overflow vulnerabilityTenda AC7 V1.0 V15.03.06.44 found a buffer overflow caused by the timeZone parameter in the form_fast_setting_wifi_set function, which can cause RCE.EPSS 0.54%9.8CVE-2024-32301Tenda ac7 firmware out-of-bounds read vulnerabilityTenda AC7V1.0 v15.03.06.44 firmware has a stack overflow vulnerability via the PPW parameter in the fromWizardHandle function.EPSS 0.81%

Source: NIST National Vulnerability Database (record CVE-2026-4974), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.