Tenda HG10 300001138 Boa Web Server /boaform/formWanRedirect if buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k2.58

Summaryinfo

A vulnerability marked as critical has been reported in Tenda HG10 300001138. Impacted is the function formWanRedirect of the file /boaform/formWanRedirect of the component Boa Web Server. The manipulation of the argument if leads to buffer overflow. This vulnerability is referenced as CVE-2026-86166. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Tenda HG10 300001138. This issue affects the function formWanRedirect of the file /boaform/formWanRedirect of the component Boa Web Server. The manipulation of the argument if with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-86166. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a public exploit are known.

The exploit is available 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.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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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: 🔒
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

09/05/2026 Advisory disclosed
09/05/2026 +0 days VulDB entry created
09/05/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: tenda.com.cn

Advisory: github.com
Status: Not defined

CVE: CVE-2026-86166 (🔒)
GCVE (CVE): GCVE-0-2026-86166
GCVE (VulDB): GCVE-100-399305
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/05/2026 12:38
Changes: 09/05/2026 12:38 (59)
Complete: 🔍
Submitter: sunnyyaya
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #895595: Tenda HG10 HG7_HG9_HG10re_300001138 Denial of Service (by sunnyyaya)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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