CVE-2025-5503Public exploitNetwork attack vector

Authenticated code execution via unbounded deviceMacAddr copy

Published Jun 3, 2025 · Updated Jun 3, 2025

Stack-based buffer overflow in TOTOLINK X15 1.0.0-B20230714.1105 allows remote authenticated users to execute code via deviceMacAddr. The formMapReboot handler passes the request parameter to strcpy without a length check, allowing the stack return address to be overwritten. A valid sessionCheck value is required; successful exploitation can run code in the router context or crash its management service.

CVSS severity8.7
High
EPSS probability5.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in TOTOLINK X15 1.0.0-B20230714.1105 allows remote authenticated users to execute code via deviceMacAddr. The formMapReboot handler passes the request parameter to strcpy without a length check, allowing the stack return address to be overwritten. A valid sessionCheck value is required; successful exploitation can run code in the router context or crash its management service.

The record

CVE
CVE-2025-5503
Published
Jun 3, 2025
Updated
Jun 3, 2025
Vendor
TOTOLINK
Product
X15
Classifications
CWE-119, CWE-121, CWE-787, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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=1.0.0-B20230714.1105

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · X15version=1.0.0-B20230714.1105

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 exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
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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