CVE-2018-16523

HIGHNVD 7.4

7.4

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 division by zero in prvCheckOptions.

CVSS v3: 7.4
EG Score: —
EPSS: 70.1%
KEV: Not listed

Published

December 6, 2018

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-details/
cve@mitrehttps://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-put-wide-range-devices-risk-compromise-smart-homes-critical-infrastructure-systems/
cve@mitrehttps://github.com/aws/amazon-freertos/blob/v1.3.2/CHANGELOG.md
af854a3a-2127-422b-91ae-364da2661108https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-details/
af854a3a-2127-422b-91ae-364da2661108https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-put-wide-range-devices-risk-compromise-smart-homes-critical-infrastructure-systems/
af854a3a-2127-422b-91ae-364da2661108https://github.com/aws/amazon-freertos/blob/v1.3.2/CHANGELOG.md

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-369Divide By Zero

Data Freshness Timeline

(refreshed 6× in last 7d / 6× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-16523?

CVE-2018-16523 is a high vulnerability published on December 6, 2018. 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 division by zero in prvCheckOptions.

When was CVE-2018-16523 disclosed?

CVE-2018-16523 was first published in the National Vulnerability Database on December 6, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-16523 actively exploited?

CVE-2018-16523 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 70.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-16523?

CVE-2018-16523 has a CVSS v3 base score of 7.4 (NVD).

How do I remediate CVE-2018-16523?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-16523, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-16523

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CVE-2018-16523

📅 Published

🔄 Last Modified

🔗 References (6)