CVE-2021-32459Public exploitNetwork attack vector

Log tampering via embedded SFTP credentials

Published May 27, 2021 · Updated Aug 3, 2024

Hard-coded credentials in Trend Micro Home Network Security 6.6.604 and earlier allow attackers to authenticate to its SFTP log server. The core binary embeds a log-upload username and password that the server accepts for creating files, changing permissions, and uploading data. Exploitation requires high-privileged code execution on the station; successful access can overwrite or replace collected logs.

CVSS severity6.5
Medium
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in Trend Micro Home Network Security 6.6.604 and earlier allow attackers to authenticate to its SFTP log server. The core binary embeds a log-upload username and password that the server accepts for creating files, changing permissions, and uploading data. Exploitation requires high-privileged code execution on the station; successful access can overwrite or replace collected logs.

The record

CVE
CVE-2021-32459
Published
May 27, 2021
Updated
Aug 3, 2024
Vendor
Trend Micro
Product
Trend Micro Home Network Security
Classifications
CWE-798, T1078
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 27, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=6.6.604 and below

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Trend Micro · Trend Micro Home Network Securityversion=6.6.604 and below

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
4.9Cisco TalosCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
5.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/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)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078Valid Accounts

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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