CVE-2025-67188Public exploitNetwork attack vector

Unauthenticated process crash via unbounded stack copy

Published Feb 3, 2026 · Updated Feb 3, 2026

Stack buffer overflow in TOTOLINK A950RG 4.1.2cu.5204_B20210112 allows remote attackers to crash the IPv6 configuration process. The setRadvdCfg handler in /lib/cste_modules/ipv6.so copies the user-controlled radvdinterfacename value into a fixed-size stack buffer with strcpy and no length check. Network access to the management interface is required; the published request demonstrates a process crash, but not code execution.

CVSS severity9.8
Critical
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in TOTOLINK A950RG 4.1.2cu.5204_B20210112 allows remote attackers to crash the IPv6 configuration process. The setRadvdCfg handler in /lib/cste_modules/ipv6.so copies the user-controlled radvdinterfacename value into a fixed-size stack buffer with strcpy and no length check. Network access to the management interface is required; the published request demonstrates a process crash, but not code execution.

The record

CVE
CVE-2025-67188
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic 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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