Is CVE-2025-11617 in the CISA KEV catalog?

No. CVE-2025-11617 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-11617?

CVE-2025-11617 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2025-11617?

CVE-2025-11617 has an EPSS score of 0.28% (20th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-11617?

Upgrade freertos-plus-tcp to 4.3.4 or later.

CVE & CISA-KEV Catalog

CVE-2025-11617

MEDIUM

5.4

CVSS v3

NVD

Description

A missing validation check in FreeRTOS-Plus-TCP's IPv6 packet processing code can lead to an out-of-bounds read when receiving a IPv6 packet with incorrect payload lengths in the packet header. This issue only affects applications using IPv6. We recommend users upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.

CWE-126Buffer Over-read

How to fix

Remediation Available

freertos-plus-tcpNVD

Affected:>= 4.0.0, < 4.3.4Fixed in:4.3.4CVE-2025-11617derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

Exploit Intelligence

0.28%probability of exploitation in 30 days

20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Vendor Advisory2

Release Notes1

github.com

Related Vulnerabilities

Other CWE-126 (Buffer Over-read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2017-7668	High	7.5	57%	-	Fix
CVE-2009-2495	Medium	6.5	42%	-	-
CVE-2017-7679	Critical	9.8	39%	-	Fix
CVE-2025-21277	High	7.5	38%	-	Fix
CVE-2024-38071	High	7.5	36%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-31.