CVE-2025-55586Public exploitNetwork attack vector

Unauthenticated web-server crash via unchecked strcpy

Published Aug 18, 2025 · Updated Aug 18, 2025

Buffer overflow in TOTOLINK A3002R 4.0.0-B20230531.1404 allows remote attackers to crash its Boa web server via a crafted request. The handler at /boafrm/formFilter passes the POST url parameter to strcpy without validating its length, overflowing a destination buffer. No authentication or user interaction is required; exploitation interrupts the router's web management interface without reported confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in TOTOLINK A3002R 4.0.0-B20230531.1404 allows remote attackers to crash its Boa web server via a crafted request. The handler at /boafrm/formFilter passes the POST url parameter to strcpy without validating its length, overflowing a destination buffer. No authentication or user interaction is required; exploitation interrupts the router's web management interface without reported confidentiality or integrity impact.

The record

CVE
CVE-2025-55586
Published
Aug 18, 2025
Updated
Aug 18, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-400Uncontrolled Resource Consumption
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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