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CVE-2018-16527

21
FAUCET Score

CVE-2018-16527 is an information disclosure 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. This flaw, rated Medium severity (CVSS 5.9), allows an unauthenticated attacker to disclose sensitive information by sending specially crafted ICMP packets, though it requires high attack complexity. There is no evidence of active exploitation, nor are there public exploit modules available in Metasploit, Nuclei, or ExploitDB. Despite limited community discussion, the vulnerability has received some 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: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
76.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0185 is in the 58th 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

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
PatchThird Party Advisory