CVE-2025-11091

Tenda AC21 SetStaticRouteCfg sscanf buffer overflow

Published: Sep 28, 2025Updated: Oct 3, 2025 Sources: CVE List NVD BDUCWE-119

8.8HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

Open in CVSS calculator →

Weaknesses

CWE-119 CWE-120

Affected Products

Tenda

commercial·CN

AC21

Networking Infrastructure

ac21 firmware

Networking Infrastructure

Shenzhen Tenda Technology Co., Ltd.

commercial·CNaka tenda

Tenda AC21On-premNetwork Device

Networking Infrastructure / router-switch

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details

Official Patch Available

Is your org exposed to CVE-2025-11091?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques

Initial Access

Privilege Escalation

View detailed technique mapping

References

https://vuldb.com/?id.326173

vuldb.com

https://vuldb.com/?ctiid.326173

vuldb.com

https://vuldb.com/?submit.661806

vuldb.com

and 2 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-11091 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows