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CVE-2025-13446— Tenda AC21 SetSysTimeCfg stack-based overflow

Quick assessment

Affected
Tenda AC21
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tenda AC21是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC21 16versions03.08.16版本存在安全漏洞，该漏洞源于对参数timeZone/time的错误操作，可能导致栈缓冲区溢出攻击。

CVSS 8.8 · High EPSS 3.88% · P90
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I. Basic Information for CVE-2025-13446

Vulnerability Information
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Vulnerability Title
Tenda AC21 SetSysTimeCfg stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file /goform/SetSysTimeCfg. The manipulation of the argument timeZone/time leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public 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 AC21 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC21是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC21 16versions03.08.16版本存在安全漏洞，该漏洞源于对参数timeZone/time的错误操作，可能导致栈缓冲区溢出攻击。
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 AC21 16.03.08.16 cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2025-13446

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5756 chars
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III. Intelligence Information for CVE-2025-13446

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Other References for CVE-2025-13446 (1)

IV. Related Vulnerabilities

Same product: AC21
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2025-13446

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