CVE-2026-6194Public exploitNetwork attack vector

Authenticated device compromise via wan-url stack overflow

Published Apr 13, 2026 · Updated Apr 13, 2026

Stack-based buffer overflow in TOTOLINK A3002MU B20211125.1046 allows remote authenticated users to compromise the router via wan-url. The sub_410188 HTTP handler for /boafrm/formWlanSetup processes an oversized wan-url value without enforcing stack-buffer bounds. Low-privilege authentication is required, and the public record does not identify whether exploitation ends in a handler crash or arbitrary code execution.

CVSS severity8.7
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in TOTOLINK A3002MU B20211125.1046 allows remote authenticated users to compromise the router via wan-url. The sub_410188 HTTP handler for /boafrm/formWlanSetup processes an oversized wan-url value without enforcing stack-buffer bounds. Low-privilege authentication is required, and the public record does not identify whether exploitation ends in a handler crash or arbitrary code execution.

The record

CVE
CVE-2026-6194
Published
Apr 13, 2026
Updated
Apr 13, 2026
Vendor
TOTOLINK
Product
A3002MU
Classifications
CWE-119, CWE-121, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 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=B20211125.1046

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · A3002MUversion=B20211125.1046

Published CVSS scores

8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.4VulDBCVSS: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
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
8.7VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
CWE-121Stack-based Buffer Overflow
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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