CVE-2018-16527

Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with FreeRTOS+TCP), and...

5.9 Medium

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 allow information disclosure during parsing of ICMP packets in prvProcessICMPPacket.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

1.85%Up 1.0 points since Apr 14, 2021

What each source reports

NVD Score used 5.9

Record: CVE-2018-16527
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

CVE List No score

Record: CVE-2018-16527
Updated: 2026-11-02

EUVDEUVD-2018-8336 No score

Record: EUVD-2018-8336
Updated: 2026-11-03

GitHub AdvisoriesGHSA-r4r9-268q-qj6x 5.9

Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with FreeRTOS+TCP), and...

Record: GHSA-r4r9-268q-qj6x
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSV 5.9

Record: CVE-2018-16527
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-16527 is a medium vulnerability (CVSS 5.9) in Amazon Freertos, published December 6, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.85%, the 79th percentile. No source names a fixed version.