CVE-2025-4826Network attack vector

Authenticated memory corruption via unchecked submit-url copy

Published May 17, 2025 · Updated May 19, 2025

Buffer overflow in TOTOLINK A702R, A3002R, and A3002RU 3.0.0-B20230809.1615 allows remote authenticated users to corrupt process memory. The /boafrm/formWirelessTbl handler copies an oversized submit-url POST parameter into a destination buffer without checking its size. Access to the authenticated web interface is required; public sources do not establish whether the proof of concept achieves code execution or only a crash.

CVSS severity8.7
High
EPSS probability0.79%
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 A702R, A3002R, and A3002RU 3.0.0-B20230809.1615 allows remote authenticated users to corrupt process memory. The /boafrm/formWirelessTbl handler copies an oversized submit-url POST parameter into a destination buffer without checking its size. Access to the authenticated web interface is required; public sources do not establish whether the proof of concept achieves code execution or only a crash.

The record

CVE
CVE-2025-4826
Published
May 17, 2025
Updated
May 19, 2025
Vendor
TOTOLINK
Product
A702R
Classifications
CWE-120, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2025CVE publishedPublication date reported by the CVE source.
  2. May 19, 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 · A702Rversion=3.0.0-B20230809.1615
TOTOLINK · A3002Rversion=3.0.0-B20230809.1615
TOTOLINK · A3002RUversion=3.0.0-B20230809.1615

Published CVSS scores

8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
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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