CVE-2026-2191
Analyzed Analyzed - Analysis Complete
Stack-Based Buffer Overflow in Tenda AC9 DDoS Function

Publication date: 2026-02-08

Last updated on: 2026-02-10

Assigner: VulDB

Description
A weakness has been identified in Tenda AC9 15.03.06.42_multi. Affected is the function formGetDdosDefenceList. This manipulation of the argument security.ddos.map causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks.
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Meta Information
Published
2026-02-08
Last Modified
2026-02-10
Generated
2026-06-16
AI Q&A
2026-02-09
EPSS Evaluated
2026-06-14
NVD
CVE-2026-2191
EUVD
EUVD-2026-6446
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
tenda ac9_firmware 15.03.06.42_multi
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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Executive Summary

This vulnerability exists in the Tenda AC9 router firmware version 15.03.06.42_multi, specifically in the function formGetDdosDefenceList.

It involves manipulation of the argument security.ddos.map, which leads to a stack-based buffer overflow.

This means an attacker can remotely exploit this weakness to potentially execute arbitrary code or cause the device to crash.

The exploit for this vulnerability has been made publicly available.

Impact Analysis

Exploitation of this vulnerability can lead to severe impacts including unauthorized code execution, denial of service, or complete compromise of the affected device.

Since the attack can be initiated remotely, it increases the risk of attackers gaining control over the router without physical access.

This could result in loss of confidentiality, integrity, and availability of network communications passing through the device.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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