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Vulnerability record · CVE-2018-16527 · published 6 December 2018

CVE-2018-16527: Amazon web services freertos information exposure vulnerability

Amazon · Amazon Web Services Freertos

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.

5.9 CVSS 3.0 Medium EPSS 1.8% · top 21.7% CWE-200 · Information exposure
5.9CVSS 3.0 base score, v2 4.3
1.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-details/ ExploitThird Party Advisory
https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-put-wide-range-devices-risk-compromise-smart-homes-criti Third Party Advisory
https://github.com/aws/amazon-freertos/blob/v1.3.2/CHANGELOG.md PatchThird Party Advisory
https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-details/ ExploitThird Party Advisory
https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-put-wide-range-devices-risk-compromise-smart-homes-criti Third Party Advisory
https://github.com/aws/amazon-freertos/blob/v1.3.2/CHANGELOG.md PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-32020Amazon freertos memory buffer overflow vulnerabilityThe kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during management of heap memory.EPSS 1.3%9.8CVE-2021-31571Amazon freertos integer overflow vulnerabilityThe kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in queue.c for queue creation.EPSS 1.4%9.8CVE-2021-31572Amazon freertos integer overflow vulnerabilityThe kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer.c for a stream buffer.EPSS 1.4%9.3CVE-2026-77234Amazon freertos incorrect authorization vulnerabilityImproper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports to execute code in privileged kernel…EPSS 0.17%8.3CVE-2026-77235Amazon freertos use after free vulnerabilityMissing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might allow local users to cause a use-after-fr…EPSS 0.16%8.3CVE-2026-77236Amazon freertos out-of-bounds write vulnerabilityMissing minimum size validation in secure context allocation in FreeRTOS-Kernel before 11.3.1 might allow local users to corrupt secure-world heap me…EPSS 0.16%8.2CVE-2026-77237Amazon freertos out-of-bounds read vulnerabilityMissing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports with…EPSS 0.18%8.1CVE-2018-16601Amazon web services freertos vulnerabilityAn issue was discovered in Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with FreeRTOS+TCP), and WITTENSTEIN WHIS Connect…EPSS 4.2%

Source: NIST National Vulnerability Database (record CVE-2018-16527), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.