Edimax BR-6675nD 1.12 POST Request /goform/formsetPPPoE pppUserName buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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 Edimax BR-6675nD 1.12. This issue affects the function formsetPPPoE of the file /goform/formsetPPPoE of the component POST Request Handler. Executing a manipulation of the argument pppUserName can lead to buffer overflow. This vulnerability is registered as CVE-2026-9399. It is possible to launch the attack remotely. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability was found in Edimax BR-6675nD 1.12. It has been declared as critical. This vulnerability affects the function formsetPPPoE of the file /goform/formsetPPPoE of the component POST Request Handler. The manipulation of the argument pppUserName 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 shared for download at lavender-bicycle-a5a.notion.site. This vulnerability was named CVE-2026-9399. 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 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 EUVD (EUVD-2026-31600). Once again VulDB remains the best source for 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
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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

05/24/2026 Advisory disclosed
05/24/2026 +0 days VulDB entry created
05/25/2026 +1 days VulDB entry last update

Sourcesinfo

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

CVE: CVE-2026-9399 (🔒)
GCVE (CVE): GCVE-0-2026-9399
GCVE (VulDB): GCVE-100-365380
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/24/2026 08:29
Updated: 05/25/2026 05:54
Changes: 05/24/2026 08:29 (58), 05/25/2026 05:54 (1)
Complete: 🔍
Submitter: yhryhryhr_tu
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #811561: EDIMAX BR-6675nD BR-6675nD v1.12 Buffer Overflow (by yhryhryhr_tu)

Once again VulDB remains the best source for vulnerability data.

Discussion

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