CVE-2025-6145Public exploitNetwork attack vector

Authenticated device crash via oversized submit-url

Published Jun 16, 2025 · Updated Jun 17, 2025

Buffer overflow in TOTOLINK EX1200T 4.1.2cu.5232_B20210713 allows remote authenticated users to crash the device via HTTP POST requests. The /boafrm/formSysLog handler copies an oversized submit-url value into a bounded memory buffer without enforcing its length. A valid sessionCheck token is required, and the published proof of concept establishes a device-level denial of service rather than code execution.

CVSS severity8.8
High
EPSS probability0.89%
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 EX1200T 4.1.2cu.5232_B20210713 allows remote authenticated users to crash the device via HTTP POST requests. The /boafrm/formSysLog handler copies an oversized submit-url value into a bounded memory buffer without enforcing its length. A valid sessionCheck token is required, and the published proof of concept establishes a device-level denial of service rather than code execution.

The record

CVE
CVE-2025-6145
Published
Jun 16, 2025
Updated
Jun 17, 2025
Vendor
TOTOLINK
Product
EX1200T
Classifications
CWE-120, CWE-119, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.1.2cu.5232_B20210713

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · EX1200Tversion=4.1.2cu.5232_B20210713

Published CVSS scores

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
7.4VulDBCVSS: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:P

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

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
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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