Tenda W20E 15.11.0.6 Web Management Interface /goform/PortalAuth formPortalAuth gotoUrl stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k2.89

Summaryinfo

A vulnerability was found in Tenda W20E 15.11.0.6. It has been classified as critical. Impacted is the function formPortalAuth of the file /goform/PortalAuth of the component Web Management Interface. The manipulation of the argument gotoUrl leads to stack-based overflow. This vulnerability is listed as CVE-2026-11523. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in Tenda W20E 15.11.0.6. It has been rated as critical. This issue affects the function formPortalAuth of the file /goform/PortalAuth of the component Web Management Interface. The manipulation of the argument gotoUrl with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to 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). Impacted is confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-11523. 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.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-35080). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

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: Stack-based overflow
CWE: CWE-121 / 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

06/07/2026 Advisory disclosed
06/07/2026 +0 days VulDB entry created
06/08/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: tenda.com.cn

Advisory: github.com
Status: Not defined

CVE: CVE-2026-11523 (🔒)
GCVE (CVE): GCVE-0-2026-11523
GCVE (VulDB): GCVE-100-369143
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/07/2026 18:11
Updated: 06/08/2026 20:32
Changes: 06/07/2026 18:11 (58), 06/08/2026 20:32 (1)
Complete: 🔍
Submitter: hacker128
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #836471: Tenda W20E Enterprise Router V15.11.0.6 Stack-based Buffer Overflow (by hacker128)

Be aware that VulDB is the high quality source for vulnerability data.

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