CVE-2025-11091

Tenda AC21 SetStaticRouteCfg sscanf buffer overflow

State: Published
Severity: 8.7 High
Published: Sep 28, 2025
Updated: Sep 29, 2025
Reserved: Sep 27, 2025

Description

A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	VulDB
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
3.0	8.8 High	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
2.0	9.0 High	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-120 Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
AC21Tenda	16.03.08.0Affected 16.03.08.1Affected 16.03.08.2Affected 16.03.08.3Affected 16.03.08.4Affected 16.03.08.5Affected 16.03.08.6Affected 16.03.08.7Affected 16.03.08.8Affected 16.03.08.9Affected 16.03.08.10Affected 16.03.08.11Affected 16.03.08.12Affected 16.03.08.13Affected 16.03.08.14Affected 16.03.08.15Affected 16.03.08.16Affected

References

VDB-326173 | Tenda AC21 SetStaticRouteCfg sscanf buffer overflowvdb-entrytechnical-description
VDB-326173 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #661806 | Shenzhen Tenda Technology Co.,Ltd. AC21 <= V16.03.08.16 Buffer Overflowthird-party-advisory
https://github.com/maximdevere/CVE2/issues/2exploitissue-tracking
https://www.tenda.com.cn/product

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