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CVE-2018-16602

22
FAUCET Score

CVE-2018-16602 describes an out-of-bounds memory access vulnerability in the DHCP response parsing function of Amazon Web Services FreeRTOS (through 1.3.1), FreeRTOS (up to V10.0.1 with FreeRTOS+TCP), and WITTENSTEIN WHIS Connect middleware TCP/IP component. This flaw, rated Medium severity (CVSS 5.9), allows for information disclosure with high confidentiality impact, requiring no user interaction and having high attack complexity. While there is no evidence of active exploitation, no public exploit code, and it is not listed in CISA's KEV catalog, it has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.1CPE matchmatch criteria
cpe:2.3:a:amazon:amazon_web_services_freertos:*:*:*:*:*:*:*:*
<= 10.0.1CPE matchmatch criteria
cpe:2.3:a:amazon:freertos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.85%
Probability of exploitation in next 30 days
EPSS Percentile
76.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0185 is in the 58th percentile among its peer group of 19,955 CVEs.

Social Chatter

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

Media Mentions

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

Remediation

Remediation records are not available for this CVE.

References

blog.zimperium.com / freertos-tcpip-stack-vulnerabilities-details
ExploitThird Party Advisory
blog.zimperium.com / freertos-tcpip-stack-vulnerabilities-put-wide-range-devices-risk-compromise-smart-homes-critical-infrastructure-systems
Third Party Advisory
github.com / aws/amazon-freertos/blob/v1.3.2/CHANGELOG.md
Release NotesThird Party Advisory