Edimax BR-6428NS 1.10 POST Request /goform/formPPTPSetup pptpUserName buffer overflow

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.0$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Edimax BR-6428NS 1.10. This issue affects the function formPPTPSetup of the file /goform/formPPTPSetup of the component POST Request Handler. Performing a manipulation of the argument pptpUserName results in buffer overflow. This vulnerability is identified as CVE-2026-8776. The attack can be initiated remotely. Additionally, an exploit exists. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability classified as critical has been found in Edimax BR-6428NS 1.10. This affects the function formPPTPSetup of the file /goform/formPPTPSetup of the component POST Request Handler. The manipulation of the argument pptpUserName with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at lavender-bicycle-a5a.notion.site. This vulnerability is uniquely identified as CVE-2026-8776. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details and a public exploit are known.

The exploit is shared for download at lavender-bicycle-a5a.notion.site. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

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 CNNVD (CNNVD-202605-4057). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

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
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/17/2026 Advisory disclosed
05/17/2026 +0 days VulDB entry created
05/19/2026 +2 days VulDB entry last update

Sourcesinfo

Advisory: lavender-bicycle-a5a.notion.site
Status: Not defined

CVE: CVE-2026-8776 (🔒)
GCVE (CVE): GCVE-0-2026-8776
GCVE (VulDB): GCVE-100-364401
CNNVD: CNNVD-202605-4057 - Edimax BR-6428nS 缓冲区错误漏洞

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/17/2026 11:46
Updated: 05/19/2026 18:47
Changes: 05/17/2026 11:46 (58), 05/19/2026 18:47 (6)
Complete: 🔍
Submitter: wxhwxhwxh_tutu
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #811531: EDIMAX BR-6428NS BR-6428NS_v4_1.10 Buffer Overflow (by wxhwxhwxh_tutu)

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!