CVE-2025-51630Public exploitNetwork attack vector

Memory corruption via unchecked ePort formatting

Published Jul 17, 2025 · Updated Jul 17, 2025

Buffer overflow in setIpPortFilterRules in TOTOLINK N350RT 9.3.5u.6139_B20201216 allows remote attackers to corrupt memory via ePort. The function passes ePort to sprintf for copying into the fixed destination v9 without validating the input length. CISA rates the path as requiring no privileges or user interaction, although the public proof of concept supplies a session cookie; no specific post-overflow consequence is documented.

CVSS severity9.8
Critical
EPSS probability0.45%
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 setIpPortFilterRules in TOTOLINK N350RT 9.3.5u.6139_B20201216 allows remote attackers to corrupt memory via ePort. The function passes ePort to sprintf for copying into the fixed destination v9 without validating the input length. CISA rates the path as requiring no privileges or user interaction, although the public proof of concept supplies a session cookie; no specific post-overflow consequence is documented.

The record

CVE
CVE-2025-51630
Published
Jul 17, 2025
Updated
Jul 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1190Exploit Public-Facing Application

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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