CVE-2025-68706Public exploitNetwork attack vector

Unauthenticated daemon crash via overlong PIN code

Published Dec 29, 2025 · Updated Dec 29, 2025

Stack-based buffer overflow in KuWFi AC900 firmware 1.0.13 allows remote attackers to crash its HTTP daemon via a crafted request. The /goform/formMultiApnSetting handler passes the untrusted pincode value to sprintf(), which copies it into the fixed 132-byte acStack_4c0 stack buffer without checking its length. No authentication or user interaction is required; stack corruption reliably interrupts the service, while code execution requires additional conditions that public sources do not specify.

CVSS severity9.8
Critical
EPSS probability4.86%
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 KuWFi AC900 firmware 1.0.13 allows remote attackers to crash its HTTP daemon via a crafted request. The /goform/formMultiApnSetting handler passes the untrusted pincode value to sprintf(), which copies it into the fixed 132-byte acStack_4c0 stack buffer without checking its length. No authentication or user interaction is required; stack corruption reliably interrupts the service, while code execution requires additional conditions that public sources do not specify.

The record

CVE
CVE-2025-68706
Published
Dec 29, 2025
Updated
Dec 29, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 29, 2025Record 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 ADP VulnrichmentCVSS: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-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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