Tenda AC21 16.03.08.16 SetNetControlList formSetQosBand list buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Tenda AC21 16.03.08.16. The affected element is the function formSetQosBand of the file /goform/SetNetControlList. Executing a manipulation of the argument list can lead to buffer overflow. This vulnerability is tracked as CVE-2026-4565. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability was found in Tenda AC21 16.03.08.16. It has been declared as critical. This vulnerability affects the function formSetQosBand of the file /goform/SetNetControlList. The manipulation of the argument list with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability was named CVE-2026-4565. The exploitation appears to be easy. The attack can be initiated remotely. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-14343). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.8
VulDB Temp Score: 8.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/22/2026 Advisory disclosed
03/22/2026 +0 days VulDB entry created
03/23/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: tenda.com.cn

Advisory: github.com
Status: Not defined

CVE: CVE-2026-4565 (🔒)
GCVE (CVE): GCVE-0-2026-4565
GCVE (VulDB): GCVE-100-352402
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/22/2026 09:34
Updated: 03/23/2026 06:46
Changes: 03/22/2026 09:34 (57), 03/23/2026 06:46 (1)
Complete: 🔍
Submitter: junqi
Cache ID: 216:523:103

Submitinfo

Accepted

  • Submit #775119: Tenda AC21 Tenda AC21 V1.0 V16.03.08.16 Buffer Overflow (by junqi)

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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