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CVE-2018-16598

21
FAUCET Score

CVE-2018-16598 is a DNS spoofing vulnerability affecting Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with FreeRTOS+TCP), and WITTENSTEIN WHIS Connect middleware TCP/IP component. The flaw allows an attacker to inject arbitrary DNS responses because the affected systems do not validate if a received DNS response matches a sent request. This medium-severity vulnerability has a CVSS score of 5.9, indicating a high impact on integrity with low attack complexity and no user interaction required. While there is no evidence of active exploitation, public exploit code, or Metasploit modules, the vulnerability has received limited community discussion and media coverage.

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:N/I:H/A:N

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

Exploit Intelligence

EPSS Score
1.52%
Probability of exploitation in next 30 days
EPSS Percentile
72.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0152 is in the 46th percentile among its peer group of 19,958 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
PatchThird 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