How severe is CVE-2026-7425?

CVE-2026-7425 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-7425 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-7425?

CVE-2026-7425 affects Amazon Freertos-plus-tcp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-7425?

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

Does CVE-2026-7425 have an EU (EUVD) identifier?

Yes. CVE-2026-7425 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26283.

When was CVE-2026-7425 published?

CVE-2026-7425 was published on 2026-04-29 and last updated on 2026-06-17.

CVE-2026-7425

CVE-2026-7425 is a medium-severity vulnerability in Amazon Freertos-plus-tcp with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
CVSS v4: 6.0
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26283
Weakness: CWE-125
Affected product: Amazon Freertos-plus-tcp
Published: 2026-04-29
Last modified: 2026-06-17

Description

Insufficient option length validation in the IPv6 Router Advertisement parser in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to cause a denial of service (device crash) by sending a crafted Router Advertisement with a truncated PREFIX_INFORMATION option that is smaller than the expected structure size. To mitigate this issue, users should upgrade to the fixed version when available.

Frequently asked questions

What is CVE-2026-7425?: Insufficient option length validation in the IPv6 Router Advertisement parser in FreeRTOS-Plus-TCP before V4.2.6 and V4.4.1 allows an adjacent network actor to cause a denial of service (device crash) by sending a crafted Router Advertisement with a truncated PREFIX_INFORMATION option that is smaller than the expected structure size. To mitigate this issue, users should upgrade to the fixed version when available.
How severe is CVE-2026-7425?: CVE-2026-7425 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-7425 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-7425?: CVE-2026-7425 affects Amazon Freertos-plus-tcp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-7425?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-7425 have an EU (EUVD) identifier?: Yes. CVE-2026-7425 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26283.
When was CVE-2026-7425 published?: CVE-2026-7425 was published on 2026-04-29 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

CVE-2024-38373 — Critical (CVSS 9.6): FreeRTOS-Plus-TCP is a lightweight TCP/IP stack for FreeRTOS. FreeRTOS-Plus-TCP versions 4.0.0 through 4.1.0 contain a…
CVE-2026-7426 — High (CVSS 8.1): Insufficient validation of the prefix length field in IPv6 Router Advertisement processing in FreeRTOS-Plus-TCP before…
CVE-2026-7424 — High (CVSS 8.1): Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent…
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…
CVE-2025-11616 — Medium (CVSS 5.4): A missing validation check in FreeRTOS-Plus-TCP's ICMPv6 packet processing code can lead to an out-of-bounds read when…

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