How severe is CVE-2019-13120?

CVE-2019-13120 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2019-13120 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-13120?

CVE-2019-13120 affects Amazon Amazon Web Services Freertos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-13120?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-13120 published?

CVE-2019-13120 was published on 2019-10-07 and last updated on 2026-06-17.

CVE-2019-13120

CVE-2019-13120 is a high-severity vulnerability in Amazon Amazon Web Services Freertos with a CVSS 3.x base score of 7.5. 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-125.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Amazon Amazon Web Services Freertos
Published: 2019-10-07
Last modified: 2026-06-17

Description

Amazon FreeRTOS up to and including v1.4.8 lacks length checking in prvProcessReceivedPublish, resulting in untargetable leakage of arbitrary memory contents on a device to an attacker. If an attacker has the authorization to send a malformed MQTT publish packet to an Amazon IoT Thing, which interacts with an associated vulnerable MQTT message in the application, specific circumstances could trigger this vulnerability.

Frequently asked questions

What is CVE-2019-13120?: Amazon FreeRTOS up to and including v1.4.8 lacks length checking in prvProcessReceivedPublish, resulting in untargetable leakage of arbitrary memory contents on a device to an attacker. If an attacker has the authorization to send a malformed MQTT publish packet to an Amazon IoT Thing, which interacts with an associated vulnerable MQTT message in the application, specific circumstances could trigger this vulnerability.
How severe is CVE-2019-13120?: CVE-2019-13120 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2019-13120 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-13120?: CVE-2019-13120 affects Amazon Amazon Web Services Freertos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-13120?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-13120 published?: CVE-2019-13120 was published on 2019-10-07 and last updated on 2026-06-17.

References

https://aws.amazon.com/cn/freertos/security-updates/

Affected products (1)

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

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