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CVE-2021-32457

24
FAUCET Score

CVE-2021-32457 is a stack-based buffer overflow vulnerability in Trend Micro Home Network Security version 6.6.604 and earlier. An attacker with low-privileged code execution can exploit this flaw by issuing a specially crafted iotcl to escalate privileges on affected devices. Rated 7.8 HIGH (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), this vulnerability allows for high impact to confidentiality, integrity, and availability. While not actively exploited in the wild and lacking public exploit code, it has garnered significant community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.6.604CPE matchmatch criteria
cpe:2.3:a:trendmicro:home_network_security:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
35.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 76th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

helpcenter.trendmicro.com / en-us/article/TMKA-10337
Vendor Advisory
talosintelligence.com / vulnerability_reports/TALOS-2021-1230
ExploitThird Party Advisory