CVE-2025-45864Public exploit

Memory corruption via unchecked addrPoolStart copy

Published May 13, 2025 · Updated May 14, 2025

Buffer overflow in TOTOLINK A3002R firmware 4.0.0-B20230531.1404 allows remote attackers to corrupt boa process memory. The formDhcpv6s handler copies the POST parameter addrPoolStart with strcpy without checking its length. The published proof of concept requires a sessionCheck value plus enabled wan_enable and enable_dhcpv6s parameters and demonstrates a boa process crash, not persistent device unavailability.

CVSS severity5.4
Medium
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

Buffer overflow in TOTOLINK A3002R firmware 4.0.0-B20230531.1404 allows remote attackers to corrupt boa process memory. The formDhcpv6s handler copies the POST parameter addrPoolStart with strcpy without checking its length. The published proof of concept requires a sessionCheck value plus enabled wan_enable and enable_dhcpv6s parameters and demonstrates a boa process crash, not persistent device unavailability.

The record

CVE
CVE-2025-45864
Published
May 13, 2025
Updated
May 14, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2025CVE publishedPublication date reported by the CVE source.
  2. May 14, 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 vectoradjacent
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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