CVE-2026-8775Public exploitNetwork attack vector

Authenticated memory corruption via L2TPUserName handling

Published May 18, 2026 · Updated May 18, 2026

Buffer overflow in Edimax BR-6428nS 1.10 allows remote authenticated users to corrupt memory through a crafted L2TP setup request. The formL2TPSetup handler at /goform/formL2TPSetup processes an oversized L2TPUserName POST value without enforcing the destination buffer's bounds. Low-privileged access to the management interface is required, and public evidence does not establish whether corruption yields a crash or code execution.

CVSS severity8.8
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Edimax BR-6428nS 1.10 allows remote authenticated users to corrupt memory through a crafted L2TP setup request. The formL2TPSetup handler at /goform/formL2TPSetup processes an oversized L2TPUserName POST value without enforcing the destination buffer's bounds. Low-privileged access to the management interface is required, and public evidence does not establish whether corruption yields a crash or code execution.

The record

CVE
CVE-2026-8775
Published
May 18, 2026
Updated
May 18, 2026
Vendor
Edimax Technology Co., Ltd.
Product
BR-6428nS
Classifications
CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 18, 2026CVE publishedPublication date reported by the CVE source.
  2. May 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Edimax Technology Co., Ltd. · BR-6428nSversion=1.10

Published CVSS scores

7.4VulDB CNA record as reproduced by INCIBE-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
9.0VulDB CNA record as reproduced by INCIBE-CERTAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDB CNA record as reproduced by INCIBE-CERTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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