LiveActive security incident?Get immediate response
CVE Record

CVE-2021-32457: Trend Micro Home Network Security version 6.6.604 and earlier is vulnerable to an iotcl stack-based buffer...

Trend Micro Home Network Security version 6.6.604 and earlier is vulnerable to an iotcl stack-based buffer overflow vulnerability which could allow an attacker to issue a specially crafted iotcl to escalate privileges on affected devices. An attacker must first obtain the ability to execute low-privileged code on the target device in order to exploit this vulnerability.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-32457 affects Trend Micro Home Network Security 6.6.604 and earlier. It is a stack-based buffer overflow that could let an attacker who already has low-privileged code execution on the device gain higher privileges. This is not described as remotely exploitable from scratch in the provided sources.

Executive priority

Prioritize inventory and vendor remediation, especially if these devices protect sensitive networks. This is a privilege-escalation issue requiring an existing foothold, so urgency is lower than a remote unauthenticated flaw but still relevant for defense-in-depth and incident containment.

Technical view

The CVE describes an iotcl stack-based buffer overflow in affected Trend Micro Home Network Security devices. Exploitation requires the attacker to first execute low-privileged code on the target device, then issue a specially crafted iotcl to escalate privileges. No CVSS vector, CWE, or fixed version is present in the provided bundle.

Likely exposure

Exposure is limited to Trend Micro Home Network Security deployments running version 6.6.604 or earlier. Risk is highest where attackers can gain code execution on the device through another flaw, weak access controls, or prior compromise.

Exploitation context

The provided bundle does not show CISA KEV listing or active exploitation evidence. The documented prerequisite is important: an attacker must already be able to run low-privileged code on the target device before using this issue for privilege escalation.

Researcher notes

The public bundle supports affected product/version, vulnerability class, and exploitation prerequisite. It does not provide CVSS, CWE mapping, a named fixed version, exploit maturity, or detailed patch instructions. Avoid assuming remote exploitability or active exploitation without additional vendor or KEV evidence.

Mitigation direction

  • Identify Trend Micro Home Network Security devices and record installed versions.
  • Review Trend Micro advisory TMKA-10337 for vendor remediation or update guidance.
  • Upgrade or remediate affected versions if vendor guidance provides a fixed release.
  • Restrict administrative and local access paths to the device.
  • Investigate and remove any unauthorized code execution footholds on affected devices.

Validation and detection

  • Confirm whether any deployed device runs version 6.6.604 or earlier.
  • Check vendor advisory status for applicable updates or workarounds.
  • Review device logs for suspicious local code execution or privilege changes.
  • Verify access controls prevent untrusted users from reaching device management functions.
  • Track CISA KEV and vendor advisories for exploitation or fix updates.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2021-32457 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Trend MicroTrend Micro Home Network Security6.6.604 and belowListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.