CVE-2025-4732Network attack vector

Authenticated memory corruption via oversized ip6addr value

Published May 16, 2025 · Updated May 16, 2025

Buffer overflow in TOTOLINK A3002R and A3002RU 3.0.0-B20230809.1615 allows remote authenticated users to corrupt router memory. The /boafrm/formFilter POST handler accepts an oversized ip6addr value without enforcing the destination buffer's bounds. Administrative web access is required; successful exploitation can crash the HTTP service or redirect affected-process execution.

CVSS severity8.7
High
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Buffer overflow in TOTOLINK A3002R and A3002RU 3.0.0-B20230809.1615 allows remote authenticated users to corrupt router memory. The /boafrm/formFilter POST handler accepts an oversized ip6addr value without enforcing the destination buffer's bounds. Administrative web access is required; successful exploitation can crash the HTTP service or redirect affected-process execution.

The record

CVE
CVE-2025-4732
Published
May 16, 2025
Updated
May 16, 2025
Vendor
TOTOLINK
Product
A3002R
Classifications
CWE-119, CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 16, 2025CVE publishedPublication date reported by the CVE source.
  2. May 16, 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=3.0.0-B20230809.1615

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · A3002Rversion=3.0.0-B20230809.1615
TOTOLINK · A3002RUversion=3.0.0-B20230809.1615

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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