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CVE-2018-16528

26
FAUCET Score

CVE-2018-16528 describes a critical remote code execution vulnerability affecting Amazon Web Services (AWS) FreeRTOS through version 1.3.1, stemming from mbedTLS context object corruption within its TLS connectivity modules. This vulnerability carries a CVSS score of 8.1 (HIGH), indicating a high-impact threat that can be exploited remotely with high confidentiality, integrity, and availability impacts, despite requiring high attack complexity. While the vulnerability has garnered some media coverage and community discussion, there is currently no public exploit code available, nor is it listed on the CISA KEV catalog, suggesting it is not actively exploited in the wild.

Impacted Technologies

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

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.29%
Probability of exploitation in next 30 days
EPSS Percentile
87.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0329 is in the 46th percentile among its peer group of 8,914 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.1 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
Third 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
Third Party Advisory