CVE-2025-5672Network attack vector

Authenticated memory corruption via oversized URL parameter

Published Jun 5, 2025 · Updated Jun 5, 2025

Buffer overflow in /boafrm/formFilter in TOTOLINK N302R Plus 3.4.0-B20201028 allows remote authenticated users to corrupt router memory. The HTTP POST handler accepts an attacker-controlled url argument that exceeds an internal buffer and overwrites adjacent memory. Access to the authenticated web interface is required; successful exploitation can crash the service or alter execution.

CVSS severity8.7
High
EPSS probability0.74%
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 /boafrm/formFilter in TOTOLINK N302R Plus 3.4.0-B20201028 allows remote authenticated users to corrupt router memory. The HTTP POST handler accepts an attacker-controlled url argument that exceeds an internal buffer and overwrites adjacent memory. Access to the authenticated web interface is required; successful exploitation can crash the service or alter execution.

The record

CVE
CVE-2025-5672
Published
Jun 5, 2025
Updated
Jun 5, 2025
Vendor
TOTOLINK
Product
N302R Plus
Classifications
CWE-120, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 5, 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?

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

  1. Affected versionversion=3.4.0-B20201028

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · N302R Plusversion=3.4.0-B20201028

Published CVSS scores

8.7VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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