How severe is CVE-2025-11618?

CVE-2025-11618 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-11618 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-11618?

CVE-2025-11618 affects Amazon Freertos-plus-tcp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-11618?

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

Does CVE-2025-11618 have an EU (EUVD) identifier?

Yes. CVE-2025-11618 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33752.

When was CVE-2025-11618 published?

CVE-2025-11618 was published on 2025-10-10 and last updated on 2026-06-17.

CVE-2025-11618

CVE-2025-11618 is a medium-severity vulnerability in Amazon Freertos-plus-tcp with a CVSS 3.x base score of 4.3. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 5.3
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-33752
Weakness: CWE-476
Affected product: Amazon Freertos-plus-tcp
Published: 2025-10-10
Last modified: 2026-06-17

Description

A missing validation check in FreeRTOS-Plus-TCP's UDP/IPv6 packet processing code can lead to an invalid pointer dereference when receiving a UDP/IPv6 packet with an incorrect IP version field in the packet header. This issue only affects applications using IPv6. We recommend upgrading to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.

Frequently asked questions

What is CVE-2025-11618?: A missing validation check in FreeRTOS-Plus-TCP's UDP/IPv6 packet processing code can lead to an invalid pointer dereference when receiving a UDP/IPv6 packet with an incorrect IP version field in the packet header. This issue only affects applications using IPv6. We recommend upgrading to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.
How severe is CVE-2025-11618?: CVE-2025-11618 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-11618 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-11618?: CVE-2025-11618 affects Amazon Freertos-plus-tcp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-11618?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-11618 have an EU (EUVD) identifier?: Yes. CVE-2025-11618 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33752.
When was CVE-2025-11618 published?: CVE-2025-11618 was published on 2025-10-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:amazon:freertos-plus-tcp:*:*:*:*:*:*:*:*

More vulnerabilities in Amazon Freertos-plus-tcp

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CVE-2026-7422 — Medium (CVSS 6.5): Insufficient packet validation in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to bypass…
CVE-2025-11617 — Medium (CVSS 5.4): A missing validation check in FreeRTOS-Plus-TCP's IPv6 packet processing code can lead to an out-of-bounds read when…

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