CVE-2026-10187Public exploitNetwork attack vector

Unauthenticated memory corruption via oversized KeyStr

Published May 31, 2026 · Updated May 31, 2026

Stack-based buffer overflow in TOTOLINK N300RH 6.1c.1353_B20190305 allows remote attackers to corrupt memory through its web interface. Handling an oversized KeyStr value in wireless.so setWiFiBasicConfig overwrites the function's stack buffer. No authentication or user interaction is required; the public proof of concept establishes remote reachability, not reliable code execution.

CVSS severity9.8
Critical
EPSS probability7.34%
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 N300RH 6.1c.1353_B20190305 allows remote attackers to corrupt memory through its web interface. Handling an oversized KeyStr value in wireless.so setWiFiBasicConfig overwrites the function's stack buffer. No authentication or user interaction is required; the public proof of concept establishes remote reachability, not reliable code execution.

The record

CVE
CVE-2026-10187
Published
May 31, 2026
Updated
May 31, 2026
Vendor
TOTOLINK
Product
N300RH Firmware
Classifications
CWE-119, CWE-121, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 31, 2026CVE publishedPublication date reported by the CVE source.
  2. May 31, 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=6.1c.1353_B20190305

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · N300RH Firmwareversion=6.1c.1353_B20190305

Published CVSS scores

10.0VulDBAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

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
Privilegesunauthenticated
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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