CVE-2026-93738Public exploitNetwork attack vector

Authenticated service interruption via unchecked webpage copy

Published Sep 18, 2026 · Updated Sep 18, 2026

Buffer overflow in TOTOLINK A3002MU Hh-B20211125.1046 allows remote authenticated users to crash its Boa web service. The formSchedule handler copies an overlong webpage POST parameter into a fixed-size buffer without enforcing a reliable length bound. A valid session token is required, and the demonstrated consequence is loss of the router's management interface until the service recovers.

CVSS severityUnavailable
Unscored
EPSS probability0.85%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in TOTOLINK A3002MU Hh-B20211125.1046 allows remote authenticated users to crash its Boa web service. The formSchedule handler copies an overlong webpage POST parameter into a fixed-size buffer without enforcing a reliable length bound. A valid session token is required, and the demonstrated consequence is loss of the router's management interface until the service recovers.

The record

CVE
CVE-2026-93738
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
TOTOLINK
Product
A3002MU
Classifications
CWE-119, CWE-120, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

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

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=Hh-B20211125.1046

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · A3002MUversion=Hh-B20211125.1046

Published CVSS scores

9.9VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
9.4VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
9.0VulDB CNAAV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
9.9VulDB CNACVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Memory Corruption
CWE-120Buffer Overflow
T1499.004Application or System Exploitation

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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