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CVE-2026-4974— Tenda AC7 POST Request SetSysTimeCfg fromSetSysTime memory corruption

Quick assessment

Affected
Tenda AC7
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 AC7是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC7 15.03.06.44版本存在安全漏洞，该漏洞源于对文件/goform/SetSysTimeCfg中参数Time的错误操作，可能导致基于栈的缓冲区溢出。

CVSS 8.8 · High EPSS 1.01% · P62

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4974

Vulnerability Information
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Vulnerability Title
Tenda AC7 POST Request SetSysTimeCfg fromSetSysTime memory corruption
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Tenda AC7 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC7是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC7 15.03.06.44版本存在安全漏洞，该漏洞源于对文件/goform/SetSysTimeCfg中参数Time的错误操作，可能导致基于栈的缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Tenda AC7 15.03.06.44 cpe:2.3:o:tenda:ac7_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4974

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III. Intelligence Information for CVE-2026-4974

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Vendor Advisories for CVE-2026-4974 (2)

Security Blog Posts for CVE-2026-4974 (1)

Same Patch Batch · Tenda · 2026-03-27 · 5 CVEs total

CVE-2026-4906 8.8 HIGH Tenda AC5 POST Request WizardHandle decodePwd stack-based overflow
CVE-2026-4960 8.8 HIGH Tenda AC6 POST Request WizardHandle fromWizardHandle stack-based overflow
CVE-2026-4961 8.8 HIGH Tenda AC6 POST Request QuickIndex formQuickIndex stack-based overflow
CVE-2026-4975 8.8 HIGH Tenda AC15 POST Request setcfm formSetCfm memory corruption

IV. Related Vulnerabilities

Same product: AC7
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-4974

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