How severe is CVE-2018-16527?

CVE-2018-16527 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-16527 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16527?

CVE-2018-16527 primarily affects Amazon Amazon Web Services Freertos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-16527?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-16527 published?

CVE-2018-16527 was published on 2018-12-06 and last updated on 2026-06-17.

CVE-2018-16527

CVE-2018-16527 is a medium-severity vulnerability in Amazon Amazon Web Services Freertos with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Amazon Amazon Web Services Freertos
Published: 2018-12-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-16527?: 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.
How severe is CVE-2018-16527?: CVE-2018-16527 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-16527 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16527?: CVE-2018-16527 primarily affects Amazon Amazon Web Services Freertos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-16527?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-16527 published?: CVE-2018-16527 was published on 2018-12-06 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:amazon:amazon_web_services_freertos:*:*:*:*:*:*:*:*
cpe:2.3:a:amazon:freertos:*:*:*:*:*:*:*:*

More vulnerabilities in Amazon Amazon Web Services Freertos

CVE-2018-16601 — High (CVSS 8.1): An issue was discovered in Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with…
CVE-2018-16528 — High (CVSS 8.1): Amazon Web Services (AWS) FreeRTOS through 1.3.1 allows remote attackers to execute arbitrary code because of mbedTLS…
CVE-2018-16526 — High (CVSS 8.1): Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with FreeRTOS+TCP), and WITTENSTEIN WHIS…
CVE-2018-16525 — High (CVSS 8.1): Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with FreeRTOS+TCP), and WITTENSTEIN WHIS…
CVE-2018-16522 — High (CVSS 8.1): Amazon Web Services (AWS) FreeRTOS through 1.3.1 has an uninitialized pointer free in SOCKETS_SetSockOpt.
CVE-2019-13120 — High (CVSS 7.5): Amazon FreeRTOS up to and including v1.4.8 lacks length checking in prvProcessReceivedPublish, resulting in…

All CVEs affecting Amazon Amazon Web Services Freertos →

Other CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities

CVE-2026-27604 — Critical (CVSS 10.0): FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version…
CVE-2026-40965 — Critical (CVSS 10.0): Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a…
CVE-2026-42826 — Critical (CVSS 10.0): Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose…
CVE-2025-29270 — Critical (CVSS 10.0): Incorrect access control in the realtime.cgi endpoint of Deep Sea Electronics devices DSE855 v1.1.0 to v1.1.26 allows…
CVE-2025-61481 — Critical (CVSS 10.0): An issue in MikroTik RouterOS v.7.14.2 and SwOS v.2.18 exposes the WebFig management interface over cleartext HTTP by…
CVE-2025-53624 — Critical (CVSS 10.0): The Docusaurus gists plugin adds a page to your Docusaurus instance, displaying all public gists of a GitHub user.…

Browse all CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities →