CVE-2025-5793Public exploitNetwork attack vector

Device crash via unchecked service_type copy

Published Jun 6, 2025 · Updated Jun 6, 2025

Buffer overflow in the EX1200T 4.1.2cu.5232_B20210713 HTTP POST handler allows remote authenticated users to crash the device. The /boafrm/formPortFw handler copies an oversized service_type value without checking the copy length, overflowing its destination buffer. A valid management-session token is required; successful exploitation interrupts service, while code execution is also reported.

CVSS severity8.8
High
EPSS probability0.91%
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 the EX1200T 4.1.2cu.5232_B20210713 HTTP POST handler allows remote authenticated users to crash the device. The /boafrm/formPortFw handler copies an oversized service_type value without checking the copy length, overflowing its destination buffer. A valid management-session token is required; successful exploitation interrupts service, while code execution is also reported.

The record

CVE
CVE-2025-5793
Published
Jun 6, 2025
Updated
Jun 6, 2025
Vendor
TOTOLINK
Product
EX1200T
Classifications
CWE-119, CWE-120, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 6, 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
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
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 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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499Endpoint Denial of Service

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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